From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/libspc/SOURCES | 4 + lib/rbcodec/codecs/libspc/libspc.make | 18 + lib/rbcodec/codecs/libspc/spc_codec.h | 491 +++++++++ lib/rbcodec/codecs/libspc/spc_cpu.c | 1049 ++++++++++++++++++++ lib/rbcodec/codecs/libspc/spc_dsp.c | 1594 ++++++++++++++++++++++++++++++ lib/rbcodec/codecs/libspc/spc_emu.c | 397 ++++++++ lib/rbcodec/codecs/libspc/spc_profiler.c | 66 ++ lib/rbcodec/codecs/libspc/spc_profiler.h | 72 ++ 8 files changed, 3691 insertions(+) create mode 100644 lib/rbcodec/codecs/libspc/SOURCES create mode 100644 lib/rbcodec/codecs/libspc/libspc.make create mode 100644 lib/rbcodec/codecs/libspc/spc_codec.h create mode 100644 lib/rbcodec/codecs/libspc/spc_cpu.c create mode 100644 lib/rbcodec/codecs/libspc/spc_dsp.c create mode 100644 lib/rbcodec/codecs/libspc/spc_emu.c create mode 100644 lib/rbcodec/codecs/libspc/spc_profiler.c create mode 100644 lib/rbcodec/codecs/libspc/spc_profiler.h (limited to 'lib/rbcodec/codecs/libspc') diff --git a/lib/rbcodec/codecs/libspc/SOURCES b/lib/rbcodec/codecs/libspc/SOURCES new file mode 100644 index 0000000000..901232a6eb --- /dev/null +++ b/lib/rbcodec/codecs/libspc/SOURCES @@ -0,0 +1,4 @@ +spc_cpu.c +spc_dsp.c +spc_emu.c +spc_profiler.c diff --git a/lib/rbcodec/codecs/libspc/libspc.make b/lib/rbcodec/codecs/libspc/libspc.make new file mode 100644 index 0000000000..a005f7914a --- /dev/null +++ b/lib/rbcodec/codecs/libspc/libspc.make @@ -0,0 +1,18 @@ +# __________ __ ___. +# Open \______ \ ____ ____ | | _\_ |__ _______ ___ +# Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / +# Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < +# Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ +# \/ \/ \/ \/ \/ +# $Id$ +# + +# libspc +SPCLIB := $(CODECDIR)/libspc.a +SPCLIB_SRC := $(call preprocess, $(RBCODECLIB_DIR)/codecs/libspc/SOURCES) +SPCLIB_OBJ := $(call c2obj, $(SPCLIB_SRC)) +OTHER_SRC += $(SPCLIB_SRC) + +$(SPCLIB): $(SPCLIB_OBJ) + $(SILENT)$(shell rm -f $@) + $(call PRINTS,AR $(@F))$(AR) rcs $@ $^ >/dev/null diff --git a/lib/rbcodec/codecs/libspc/spc_codec.h b/lib/rbcodec/codecs/libspc/spc_codec.h new file mode 100644 index 0000000000..7f6b6e2e9f --- /dev/null +++ b/lib/rbcodec/codecs/libspc/spc_codec.h @@ -0,0 +1,491 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2007-2008 Michael Sevakis (jhMikeS) + * Copyright (C) 2006-2007 Adam Gashlin (hcs) + * Copyright (C) 2004-2007 Shay Green (blargg) + * Copyright (C) 2002 Brad Martin + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +/* lovingly ripped off from Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */ +/* DSP Based on Brad Martin's OpenSPC DSP emulator */ +/* tag reading from sexyspc by John Brawn (John_Brawn@yahoo.com) and others */ + +#ifndef _SPC_CODEC_H_ +#define _SPC_CODEC_H_ + +/* rather than comment out asserts, just define NDEBUG */ +#ifndef NDEBUG +#define NDEBUG +#endif +#include + +/** Basic configuration options **/ + +#ifndef ARM_ARCH +#define ARM_ARCH 0 +#endif + +#define SPC_DUAL_CORE 1 + +#if !defined(SPC_DUAL_CORE) || NUM_CORES == 1 +#undef SPC_DUAL_CORE +#define SPC_DUAL_CORE 0 +#endif + +/* Only some targets are fast enough for gaussian and realtime BRR decode */ +#if CONFIG_CPU == S3C2440 || CONFIG_CPU == IMX31L || \ + CONFIG_CPU == AS3525 || CONFIG_CPU == AS3525v2 || \ + defined(CPU_S5L870X) || \ + (CONFIG_PLATFORM & PLATFORM_HOSTED) || MEMORYSIZE <= 2 + /* Don't cache BRR waves */ + #define SPC_BRRCACHE 0 + + /* Allow gaussian interpolation */ + #define SPC_NOINTERP 0 + + /* Allow echo processing */ + #define SPC_NOECHO 0 +#elif defined(CPU_COLDFIRE) + /* Cache BRR waves */ + #define SPC_BRRCACHE 1 + + /* Disable gaussian interpolation */ + #define SPC_NOINTERP 1 + + /* Allow echo processing */ + #define SPC_NOECHO 0 +#elif defined (CPU_PP) && SPC_DUAL_CORE + /* Cache BRR waves */ + #define SPC_BRRCACHE 1 + + /* Disable gaussian interpolation */ + #define SPC_NOINTERP 1 + + /* Allow echo processing */ + #define SPC_NOECHO 0 +#else + /* Cache BRR waves */ + #define SPC_BRRCACHE 1 + + /* Disable gaussian interpolation */ + #define SPC_NOINTERP 1 + + /* Disable echo processing */ + #define SPC_NOECHO 1 +#endif + +#if (CONFIG_CPU == MCF5250) +#define IBSS_ATTR_SPC IBSS_ATTR +#define ICODE_ATTR_SPC ICODE_ATTR +#define ICONST_ATTR_SPC ICONST_ATTR +/* Not enough IRAM available to move further data to it. */ +#define IBSS_ATTR_SPC_LARGE_IRAM + +#elif (CONFIG_CPU == PP5020) +/* spc is slower on PP5020 when moving data to IRAM. */ +#define IBSS_ATTR_SPC +#define ICODE_ATTR_SPC +#define ICONST_ATTR_SPC +/* Not enough IRAM available to move further data to it. */ +#define IBSS_ATTR_SPC_LARGE_IRAM + +#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) +#define IBSS_ATTR_SPC IBSS_ATTR +#define ICODE_ATTR_SPC ICODE_ATTR +#define ICONST_ATTR_SPC ICONST_ATTR +/* Not enough IRAM available to move further data to it. */ +#define IBSS_ATTR_SPC_LARGE_IRAM + +#elif defined(CPU_S5L870X) +#define IBSS_ATTR_SPC IBSS_ATTR +#define ICODE_ATTR_SPC ICODE_ATTR +#define ICONST_ATTR_SPC ICONST_ATTR +/* Very large IRAM. Move even more data to it. */ +#define IBSS_ATTR_SPC_LARGE_IRAM IBSS_ATTR + +#else +#define IBSS_ATTR_SPC IBSS_ATTR +#define ICODE_ATTR_SPC ICODE_ATTR +#define ICONST_ATTR_SPC ICONST_ATTR +/* Not enough IRAM available to move further data to it. */ +#define IBSS_ATTR_SPC_LARGE_IRAM +#endif + +#if SPC_DUAL_CORE + #undef SHAREDBSS_ATTR + #define SHAREDBSS_ATTR __attribute__ ((section(".ibss"))) + #undef SHAREDDATA_ATTR + #define SHAREDDATA_ATTR __attribute__((section(".idata"))) +#endif + +/* Samples per channel per iteration */ +#if defined(CPU_PP) && NUM_CORES == 1 +#define WAV_CHUNK_SIZE 2048 +#else +#define WAV_CHUNK_SIZE 1024 +#endif + +/**************** Little-endian handling ****************/ + +static inline unsigned get_le16( void const* p ) +{ + return ((unsigned char const*) p) [1] * 0x100u + + ((unsigned char const*) p) [0]; +} + +static inline int get_le16s( void const* p ) +{ + return ((signed char const*) p) [1] * 0x100 + + ((unsigned char const*) p) [0]; +} + +static inline void set_le16( void* p, unsigned n ) +{ + ((unsigned char*) p) [1] = (unsigned char) (n >> 8); + ((unsigned char*) p) [0] = (unsigned char) n; +} + +#define GET_LE16( addr ) get_le16( addr ) +#define GET_LE16A( addr ) get_le16( addr ) +#define SET_LE16( addr, data ) set_le16( addr, data ) +#define INT16A( addr ) (*(uint16_t*) (addr)) +#define INT16SA( addr ) (*(int16_t*) (addr)) + +#ifdef ROCKBOX_LITTLE_ENDIAN + #define GET_LE16SA( addr ) (*( int16_t*) (addr)) + #define SET_LE16A( addr, data ) (void) (*(uint16_t*) (addr) = (data)) +#else + #define GET_LE16SA( addr ) get_le16s( addr ) + #define SET_LE16A( addr, data ) set_le16 ( addr, data ) +#endif + +struct Spc_Emu; +#define THIS struct Spc_Emu* const this + +/* The CPU portion (shock!) */ + +struct cpu_regs_t +{ + long pc; /* more than 16 bits to allow overflow detection */ + uint8_t a; + uint8_t x; + uint8_t y; + uint8_t status; + uint8_t sp; +}; + +struct src_dir +{ + uint16_t start; + uint16_t loop; +}; + +struct cpu_ram_t +{ + union { + uint8_t padding1 [0x100]; + uint16_t align; + } padding1 [1]; + union { + uint8_t ram [0x10000]; + struct src_dir sd [0x10000/sizeof(struct src_dir)]; + }; + uint8_t padding2 [0x100]; +}; + +#undef RAM +#define RAM ram.ram +extern struct cpu_ram_t ram; + +long CPU_run( THIS, long start_time ) ICODE_ATTR_SPC; +void CPU_Init( THIS ); + +/* The DSP portion (awe!) */ +enum { VOICE_COUNT = 8 }; +enum { REGISTER_COUNT = 128 }; + +struct raw_voice_t +{ + int8_t volume [2]; + uint8_t rate [2]; + uint8_t waveform; + uint8_t adsr [2]; /* envelope rates for attack, decay, and sustain */ + uint8_t gain; /* envelope gain (if not using ADSR) */ + int8_t envx; /* current envelope level */ + int8_t outx; /* current sample */ + int8_t unused [6]; +}; + +struct globals_t +{ + int8_t unused1 [12]; + int8_t volume_0; /* 0C Main Volume Left (-.7) */ + int8_t echo_feedback; /* 0D Echo Feedback (-.7) */ + int8_t unused2 [14]; + int8_t volume_1; /* 1C Main Volume Right (-.7) */ + int8_t unused3 [15]; + int8_t echo_volume_0; /* 2C Echo Volume Left (-.7) */ + uint8_t pitch_mods; /* 2D Pitch Modulation on/off for each voice */ + int8_t unused4 [14]; + int8_t echo_volume_1; /* 3C Echo Volume Right (-.7) */ + uint8_t noise_enables; /* 3D Noise output on/off for each voice */ + int8_t unused5 [14]; + uint8_t key_ons; /* 4C Key On for each voice */ + uint8_t echo_ons; /* 4D Echo on/off for each voice */ + int8_t unused6 [14]; + uint8_t key_offs; /* 5C key off for each voice + (instantiates release mode) */ + uint8_t wave_page; /* 5D source directory (wave table offsets) */ + int8_t unused7 [14]; + uint8_t flags; /* 6C flags and noise freq */ + uint8_t echo_page; /* 6D */ + int8_t unused8 [14]; + uint8_t wave_ended; /* 7C */ + uint8_t echo_delay; /* 7D ms >> 4 */ + char unused9 [2]; +}; + +enum state_t +{ /* -1, 0, +1 allows more efficient if statements */ + state_decay = -1, + state_sustain = 0, + state_attack = +1, + state_release = 2 +}; + +struct cache_entry_t +{ + int16_t const* samples; + unsigned end; /* past-the-end position */ + unsigned loop; /* number of samples in loop */ + unsigned start_addr; +}; + +enum { BRR_BLOCK_SIZE = 16 }; +enum { BRR_CACHE_SIZE = 0x20000 + 32} ; + +struct voice_t +{ +#if SPC_BRRCACHE + int16_t const* samples; + long wave_end; + int wave_loop; +#else + int16_t samples [3 + BRR_BLOCK_SIZE + 1]; + int block_header; /* header byte from current block */ +#endif + uint8_t const* addr; + short volume [2]; + long position;/* position in samples buffer, with 12-bit fraction */ + short envx; + short env_mode; + short env_timer; + short key_on_delay; +}; + +#if SPC_BRRCACHE +/* a little extra for samples that go past end */ +extern int16_t BRRcache [BRR_CACHE_SIZE]; +#endif + +enum { FIR_BUF_HALF = 8 }; + +#if defined(CPU_COLDFIRE) +/* global because of the large aligment requirement for hardware masking - + * L-R interleaved 16-bit samples for easy loading and mac.w use. + */ +enum +{ + FIR_BUF_CNT = FIR_BUF_HALF, + FIR_BUF_SIZE = FIR_BUF_CNT * sizeof ( int32_t ), + FIR_BUF_ALIGN = FIR_BUF_SIZE * 2, + FIR_BUF_MASK = ~((FIR_BUF_ALIGN / 2) | (sizeof ( int32_t ) - 1)) +}; +#elif defined (CPU_ARM) +#if ARM_ARCH >= 6 +enum +{ + FIR_BUF_CNT = FIR_BUF_HALF * 2, + FIR_BUF_SIZE = FIR_BUF_CNT * sizeof ( int32_t ), + FIR_BUF_ALIGN = FIR_BUF_SIZE, + FIR_BUF_MASK = ~((FIR_BUF_ALIGN / 2) | (sizeof ( int32_t ) - 1)) +}; +#else +enum +{ + FIR_BUF_CNT = FIR_BUF_HALF * 2 * 2, + FIR_BUF_SIZE = FIR_BUF_CNT * sizeof ( int32_t ), + FIR_BUF_ALIGN = FIR_BUF_SIZE, + FIR_BUF_MASK = ~((FIR_BUF_ALIGN / 2) | (sizeof ( int32_t ) * 2 - 1)) +}; +#endif /* ARM_ARCH */ +#endif /* CPU_* */ + +struct Spc_Dsp +{ + union + { + struct raw_voice_t voice [VOICE_COUNT]; + uint8_t reg [REGISTER_COUNT]; + struct globals_t g; + int16_t align; + } r; + + unsigned echo_pos; + int keys_down; + int noise_count; + uint16_t noise; /* also read as int16_t */ + +#if defined(CPU_COLDFIRE) + /* FIR history is interleaved. Hardware handles wrapping by mask. + * |LR|LR|LR|LR|LR|LR|LR|LR| */ + int32_t *fir_ptr; + /* wrapped address just behind current position - + allows mac.w to increment and mask fir_ptr */ + int32_t *last_fir_ptr; + /* copy of echo FIR constants as int16_t for use with mac.w */ + int16_t fir_coeff [VOICE_COUNT]; +#elif defined (CPU_ARM) + /* fir_buf [i + 8] == fir_buf [i], to avoid wrap checking in FIR code */ + int32_t *fir_ptr; +#if ARM_ARCH >= 6 + /* FIR history is interleaved with guard to eliminate wrap checking + * when convolving. + * |LR|LR|LR|LR|LR|LR|LR|LR|--|--|--|--|--|--|--|--| */ + /* copy of echo FIR constants as int16_t, loaded as int32 for + * halfword, packed multiples */ + int16_t fir_coeff [VOICE_COUNT]; +#else + /* FIR history is interleaved with guard to eliminate wrap checking + * when convolving. + * |LL|RR|LL|RR|LL|RR|LL|RR|LL|RR|LL|RR|LL|RR|LL|RR|... + * |--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--| */ + /* copy of echo FIR constants as int32_t, for faster access */ + int32_t fir_coeff [VOICE_COUNT]; +#endif /* ARM_ARCH */ +#else /* Unoptimized CPU */ + /* fir_buf [i + 8] == fir_buf [i], to avoid wrap checking in FIR code */ + int fir_pos; /* (0 to 7) */ + int fir_buf [FIR_BUF_HALF * 2] [2]; + /* copy of echo FIR constants as int, for faster access */ + int fir_coeff [VOICE_COUNT]; +#endif + + struct voice_t voice_state [VOICE_COUNT]; + +#if SPC_BRRCACHE + uint8_t oldsize; + struct cache_entry_t wave_entry [256]; + struct cache_entry_t wave_entry_old [256]; +#endif +}; + +void DSP_run_( struct Spc_Dsp* this, long count, int32_t* out_buf ) ICODE_ATTR_SPC; +void DSP_reset( struct Spc_Dsp* this ); + +static inline void DSP_run( struct Spc_Dsp* this, long count, int32_t* out ) +{ + /* Should we just fill the buffer with silence? Flags won't be cleared */ + /* during this run so it seems it should keep resetting every sample. */ + if ( this->r.g.flags & 0x80 ) + DSP_reset( this ); + + DSP_run_( this, count, out ); +} + +/**************** SPC emulator ****************/ +/* 1.024 MHz clock / 32000 samples per second */ +enum { CLOCKS_PER_SAMPLE = 32 }; + +enum { EXTRA_CLOCKS = CLOCKS_PER_SAMPLE / 2 }; + +/* using this disables timer (since this will always be in the future) */ +enum { TIMER_DISABLED_TIME = 127 }; + +enum { ROM_SIZE = 64 }; +enum { ROM_ADDR = 0xFFC0 }; + +enum { TIMER_COUNT = 3 }; + +struct Timer +{ + long next_tick; + int period; + int count; + int shift; + int enabled; + int counter; +}; + +struct Spc_Emu +{ + uint8_t cycle_table [0x100]; + struct cpu_regs_t r; + + int32_t* sample_buf; + long next_dsp; + int rom_enabled; + int extra_cycles; + + struct Timer timer [TIMER_COUNT]; + + /* large objects at end */ + struct Spc_Dsp dsp; + uint8_t extra_ram [ROM_SIZE]; + uint8_t boot_rom [ROM_SIZE]; +}; + +enum { SPC_FILE_SIZE = 0x10180 }; + +struct spc_file_t +{ + char signature [27]; + char unused [10]; + uint8_t pc [2]; + uint8_t a; + uint8_t x; + uint8_t y; + uint8_t status; + uint8_t sp; + char unused2 [212]; + uint8_t ram [0x10000]; + uint8_t dsp [128]; + uint8_t ipl_rom [128]; +}; + +void SPC_Init( THIS ); + +int SPC_load_spc( THIS, const void* data, long size ); + +/**************** DSP interaction ****************/ +void DSP_write( struct Spc_Dsp* this, int i, int data ) ICODE_ATTR_SPC; + +static inline int DSP_read( struct Spc_Dsp* this, int i ) +{ + assert( (unsigned) i < REGISTER_COUNT ); + return this->r.reg [i]; +} + +int SPC_read( THIS, unsigned addr, long const time ) ICODE_ATTR_SPC; +void SPC_write( THIS, unsigned addr, int data, long const time ) ICODE_ATTR_SPC; + +/**************** Sample generation ****************/ +int SPC_play( THIS, long count, int32_t* out ) ICODE_ATTR_SPC; + +#endif /* _SPC_CODEC_H_ */ diff --git a/lib/rbcodec/codecs/libspc/spc_cpu.c b/lib/rbcodec/codecs/libspc/spc_cpu.c new file mode 100644 index 0000000000..23dcc257de --- /dev/null +++ b/lib/rbcodec/codecs/libspc/spc_cpu.c @@ -0,0 +1,1049 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2006-2007 Adam Gashlin (hcs) + * Copyright (C) 2004-2007 Shay Green (blargg) + * Copyright (C) 2002 Brad Martin + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +/* The CPU portion (shock!) */ +#include "codeclib.h" +#include "spc_codec.h" +#include "spc_profiler.h" + +#undef check +#define check assert + +#define READ( addr ) (SPC_read( this, addr, spc_time_ )) +#define WRITE( addr, value ) (SPC_write( this, addr, value, spc_time_ )) + +#define READ_DP( addr ) READ( (addr) + dp ) +#define WRITE_DP( addr, value ) WRITE( (addr) + dp, value ) + +#define READ_PROG16( addr ) GET_LE16( RAM + (addr) ) + +#define READ_PC( pc ) (*(pc)) +#define READ_PC16( pc ) GET_LE16( pc ) + +#define SET_PC( n ) (pc = RAM + (n)) +#define GET_PC() (pc - RAM) + +static unsigned char const cycle_table [0x100] = { + 2,8,4,5,3,4,3,6,2,6,5,4,5,4,6,8, /* 0 */ + 2,8,4,5,4,5,5,6,5,5,6,5,2,2,4,6, /* 1 */ + 2,8,4,5,3,4,3,6,2,6,5,4,5,4,5,4, /* 2 */ + 2,8,4,5,4,5,5,6,5,5,6,5,2,2,3,8, /* 3 */ + 2,8,4,5,3,4,3,6,2,6,4,4,5,4,6,6, /* 4 */ + 2,8,4,5,4,5,5,6,5,5,4,5,2,2,4,3, /* 5 */ + 2,8,4,5,3,4,3,6,2,6,4,4,5,4,5,5, /* 6 */ + 2,8,4,5,4,5,5,6,5,5,5,5,2,2,3,6, /* 7 */ + 2,8,4,5,3,4,3,6,2,6,5,4,5,2,4,5, /* 8 */ + 2,8,4,5,4,5,5,6,5,5,5,5,2,2,12,5,/* 9 */ + 3,8,4,5,3,4,3,6,2,6,4,4,5,2,4,4, /* A */ + 2,8,4,5,4,5,5,6,5,5,5,5,2,2,3,4, /* B */ + 3,8,4,5,4,5,4,7,2,5,6,4,5,2,4,9, /* C */ + 2,8,4,5,5,6,6,7,4,5,4,5,2,2,6,3, /* D */ + 2,8,4,5,3,4,3,6,2,4,5,3,4,3,4,3, /* E */ + 2,8,4,5,4,5,5,6,3,4,5,4,2,2,4,3 /* F */ +}; + +#define MEM_BIT() CPU_mem_bit( this, pc, spc_time_ ) + +static unsigned CPU_mem_bit( THIS, uint8_t const* pc, long const spc_time_ ) + ICODE_ATTR_SPC; + +static unsigned CPU_mem_bit( THIS, uint8_t const* pc, long const spc_time_ ) +{ + unsigned addr = READ_PC16( pc ); + unsigned t = READ( addr & 0x1FFF ) >> (addr >> 13); + return (t << 8) & 0x100; +} + +/* status flags */ +enum { st_n = 0x80 }; +enum { st_v = 0x40 }; +enum { st_p = 0x20 }; +enum { st_b = 0x10 }; +enum { st_h = 0x08 }; +enum { st_i = 0x04 }; +enum { st_z = 0x02 }; +enum { st_c = 0x01 }; + +#define IS_NEG (nz & 0x880) + +#define CALC_STATUS( out )\ +{\ + out = status & ~(st_n | st_z | st_c);\ + out |= (c >> 8) & st_c;\ + out |= (dp >> 3) & st_p;\ + if ( IS_NEG ) out |= st_n;\ + if ( !(nz & 0xFF) ) out |= st_z;\ +} + +#define SET_STATUS( in )\ +{\ + status = in & ~(st_n | st_z | st_c | st_p);\ + c = in << 8;\ + nz = ((in << 4) & 0x800) | (~in & st_z);\ + dp = (in << 3) & 0x100;\ +} + + +/* stack */ +#define PUSH( v ) (*--sp = (uint8_t) (v)) +#define PUSH16( v ) (sp -= 2, SET_LE16( sp, v )) +#define POP() (*sp++) +#define SET_SP( v ) (sp = RAM + 0x101 + (v)) +#define GET_SP() (sp - 0x101 - RAM) + +long CPU_run( THIS, long start_time ) +{ +#if 0 + ENTER_TIMER(cpu); +#endif + + register long spc_time_ = start_time; + +#ifdef CPU_ARM + uint8_t* const ram_ = ram.ram; + #undef RAM + #define RAM ram_ +#endif + + int a = this->r.a; + int x = this->r.x; + int y = this->r.y; + + uint8_t const* pc; + SET_PC( this->r.pc ); + + uint8_t* sp; + SET_SP( this->r.sp ); + + int status; + int c; + int nz; + unsigned dp; + { + int temp = this->r.status; + SET_STATUS( temp ); + } + + goto loop; + + /* main loop */ +cbranch_taken_loop: + pc += *(int8_t const*) pc; + spc_time_ += 2; +inc_pc_loop: + pc++; +loop: + check( (unsigned) GET_PC() < 0x10000 ); + check( (unsigned) GET_SP() < 0x100 ); + check( (unsigned) a < 0x100 ); + check( (unsigned) x < 0x100 ); + check( (unsigned) y < 0x100 ); + + unsigned opcode = *pc; + int cycles = this->cycle_table [opcode]; + unsigned data = *++pc; + if ( (spc_time_ += cycles) > 0 ) + goto out_of_time; + switch ( opcode ) + { + +/* Common instructions */ + +#define BRANCH( cond )\ +{\ + pc++;\ + int offset = (int8_t) data;\ + if ( cond ) {\ + pc += offset;\ + spc_time_ += 2;\ + }\ + goto loop;\ +} + + case 0xF0: /* BEQ (most common) */ + BRANCH( !(uint8_t) nz ) + + case 0xD0: /* BNE */ + BRANCH( (uint8_t) nz ) + + case 0x3F: /* CALL */ + PUSH16( GET_PC() + 2 ); + SET_PC( READ_PC16( pc ) ); + goto loop; + + case 0x6F: /* RET */ + SET_PC( POP() ); + pc += POP() * 0x100; + goto loop; + +#define CASE( n ) case n: + +/* Define common address modes based on opcode for immediate mode. Execution + ends with data set to the address of the operand. */ +#define ADDR_MODES( op )\ + CASE( op - 0x02 ) /* (X) */\ + data = x + dp;\ + pc--;\ + goto end_##op;\ + CASE( op + 0x0F ) /* (dp)+Y */\ + data = READ_PROG16( data + dp ) + y;\ + goto end_##op;\ + CASE( op - 0x01 ) /* (dp+X) */\ + data = READ_PROG16( ((uint8_t) (data + x)) + dp );\ + goto end_##op;\ + CASE( op + 0x0E ) /* abs+Y */\ + data += y;\ + goto abs_##op;\ + CASE( op + 0x0D ) /* abs+X */\ + data += x;\ + CASE( op - 0x03 ) /* abs */\ + abs_##op:\ + data += 0x100 * READ_PC( ++pc );\ + goto end_##op;\ + CASE( op + 0x0C ) /* dp+X */\ + data = (uint8_t) (data + x);\ + CASE( op - 0x04 ) /* dp */\ + data += dp;\ + end_##op: + +/* 1. 8-bit Data Transmission Commands. Group I */ + + ADDR_MODES( 0xE8 ) /* MOV A,addr */ + /*case 0xE4:*/ /* MOV a,dp (most common) */ + mov_a_addr: + a = nz = READ( data ); + goto inc_pc_loop; + case 0xBF: /* MOV A,(X)+ */ + data = x + dp; + x = (uint8_t) (x + 1); + pc--; + goto mov_a_addr; + + case 0xE8: /* MOV A,imm */ + a = data; + nz = data; + goto inc_pc_loop; + + case 0xF9: /* MOV X,dp+Y */ + data = (uint8_t) (data + y); + case 0xF8: /* MOV X,dp */ + data += dp; + goto mov_x_addr; + case 0xE9: /* MOV X,abs */ + data = READ_PC16( pc ); + pc++; + mov_x_addr: + data = READ( data ); + case 0xCD: /* MOV X,imm */ + x = data; + nz = data; + goto inc_pc_loop; + + case 0xFB: /* MOV Y,dp+X */ + data = (uint8_t) (data + x); + case 0xEB: /* MOV Y,dp */ + data += dp; + goto mov_y_addr; + case 0xEC: /* MOV Y,abs */ + data = READ_PC16( pc ); + pc++; + mov_y_addr: + data = READ( data ); + case 0x8D: /* MOV Y,imm */ + y = data; + nz = data; + goto inc_pc_loop; + +/* 2. 8-BIT DATA TRANSMISSION COMMANDS, GROUP 2 */ + + ADDR_MODES( 0xC8 ) /* MOV addr,A */ + WRITE( data, a ); + goto inc_pc_loop; + + { + int temp; + case 0xCC: /* MOV abs,Y */ + temp = y; + goto mov_abs_temp; + case 0xC9: /* MOV abs,X */ + temp = x; + mov_abs_temp: + WRITE( READ_PC16( pc ), temp ); + pc += 2; + goto loop; + } + + case 0xD9: /* MOV dp+Y,X */ + data = (uint8_t) (data + y); + case 0xD8: /* MOV dp,X */ + WRITE( data + dp, x ); + goto inc_pc_loop; + + case 0xDB: /* MOV dp+X,Y */ + data = (uint8_t) (data + x); + case 0xCB: /* MOV dp,Y */ + WRITE( data + dp, y ); + goto inc_pc_loop; + + case 0xFA: /* MOV dp,dp */ + data = READ( data + dp ); + case 0x8F: /* MOV dp,#imm */ + WRITE_DP( READ_PC( ++pc ), data ); + goto inc_pc_loop; + +/* 3. 8-BIT DATA TRANSMISSIN COMMANDS, GROUP 3. */ + + case 0x7D: /* MOV A,X */ + a = x; + nz = x; + goto loop; + + case 0xDD: /* MOV A,Y */ + a = y; + nz = y; + goto loop; + + case 0x5D: /* MOV X,A */ + x = a; + nz = a; + goto loop; + + case 0xFD: /* MOV Y,A */ + y = a; + nz = a; + goto loop; + + case 0x9D: /* MOV X,SP */ + x = nz = GET_SP(); + goto loop; + + case 0xBD: /* MOV SP,X */ + SET_SP( x ); + goto loop; + + /*case 0xC6:*/ /* MOV (X),A (handled by MOV addr,A in group 2) */ + + case 0xAF: /* MOV (X)+,A */ + WRITE_DP( x, a ); + x++; + goto loop; + +/* 5. 8-BIT LOGIC OPERATION COMMANDS */ + +#define LOGICAL_OP( op, func )\ + ADDR_MODES( op ) /* addr */\ + data = READ( data );\ + case op: /* imm */\ + nz = a func##= data;\ + goto inc_pc_loop;\ + { unsigned addr;\ + case op + 0x11: /* X,Y */\ + data = READ_DP( y );\ + addr = x + dp;\ + pc--;\ + goto addr_##op;\ + case op + 0x01: /* dp,dp */\ + data = READ_DP( data );\ + case op + 0x10: /*dp,imm*/\ + addr = READ_PC( ++pc ) + dp;\ + addr_##op:\ + nz = data func READ( addr );\ + WRITE( addr, nz );\ + goto inc_pc_loop;\ + } + + LOGICAL_OP( 0x28, & ); /* AND */ + + LOGICAL_OP( 0x08, | ); /* OR */ + + LOGICAL_OP( 0x48, ^ ); /* EOR */ + +/* 4. 8-BIT ARITHMETIC OPERATION COMMANDS */ + + ADDR_MODES( 0x68 ) /* CMP addr */ + data = READ( data ); + case 0x68: /* CMP imm */ + nz = a - data; + c = ~nz; + nz &= 0xFF; + goto inc_pc_loop; + + case 0x79: /* CMP (X),(Y) */ + data = READ_DP( x ); + nz = data - READ_DP( y ); + c = ~nz; + nz &= 0xFF; + goto loop; + + case 0x69: /* CMP (dp),(dp) */ + data = READ_DP( data ); + case 0x78: /* CMP dp,imm */ + nz = READ_DP( READ_PC( ++pc ) ) - data; + c = ~nz; + nz &= 0xFF; + goto inc_pc_loop; + + case 0x3E: /* CMP X,dp */ + data += dp; + goto cmp_x_addr; + case 0x1E: /* CMP X,abs */ + data = READ_PC16( pc ); + pc++; + cmp_x_addr: + data = READ( data ); + case 0xC8: /* CMP X,imm */ + nz = x - data; + c = ~nz; + nz &= 0xFF; + goto inc_pc_loop; + + case 0x7E: /* CMP Y,dp */ + data += dp; + goto cmp_y_addr; + case 0x5E: /* CMP Y,abs */ + data = READ_PC16( pc ); + pc++; + cmp_y_addr: + data = READ( data ); + case 0xAD: /* CMP Y,imm */ + nz = y - data; + c = ~nz; + nz &= 0xFF; + goto inc_pc_loop; + + { + int addr; + case 0xB9: /* SBC (x),(y) */ + case 0x99: /* ADC (x),(y) */ + pc--; /* compensate for inc later */ + data = READ_DP( x ); + addr = y + dp; + goto adc_addr; + case 0xA9: /* SBC dp,dp */ + case 0x89: /* ADC dp,dp */ + data = READ_DP( data ); + case 0xB8: /* SBC dp,imm */ + case 0x98: /* ADC dp,imm */ + addr = READ_PC( ++pc ) + dp; + adc_addr: + nz = READ( addr ); + goto adc_data; + +/* catch ADC and SBC together, then decode later based on operand */ +#undef CASE +#define CASE( n ) case n: case (n) + 0x20: + ADDR_MODES( 0x88 ) /* ADC/SBC addr */ + data = READ( data ); + case 0xA8: /* SBC imm */ + case 0x88: /* ADC imm */ + addr = -1; /* A */ + nz = a; + adc_data: { + if ( opcode & 0x20 ) + data ^= 0xFF; /* SBC */ + int carry = (c >> 8) & 1; + int ov = (nz ^ 0x80) + carry + (int8_t) data; /* sign-extend */ + int hc = (nz & 15) + carry; + c = nz += data + carry; + hc = (nz & 15) - hc; + status = (status & ~(st_v | st_h)) | ((ov >> 2) & st_v) | + ((hc >> 1) & st_h); + if ( addr < 0 ) { + a = (uint8_t) nz; + goto inc_pc_loop; + } + WRITE( addr, (uint8_t) nz ); + goto inc_pc_loop; + } + + } + +/* 6. ADDITION & SUBTRACTION COMMANDS */ + +#define INC_DEC_REG( reg, n )\ + nz = reg + n;\ + reg = (uint8_t) nz;\ + goto loop; + + case 0xBC: INC_DEC_REG( a, 1 ) /* INC A */ + case 0x3D: INC_DEC_REG( x, 1 ) /* INC X */ + case 0xFC: INC_DEC_REG( y, 1 ) /* INC Y */ + + case 0x9C: INC_DEC_REG( a, -1 ) /* DEC A */ + case 0x1D: INC_DEC_REG( x, -1 ) /* DEC X */ + case 0xDC: INC_DEC_REG( y, -1 ) /* DEC Y */ + + case 0x9B: /* DEC dp+X */ + case 0xBB: /* INC dp+X */ + data = (uint8_t) (data + x); + case 0x8B: /* DEC dp */ + case 0xAB: /* INC dp */ + data += dp; + goto inc_abs; + case 0x8C: /* DEC abs */ + case 0xAC: /* INC abs */ + data = READ_PC16( pc ); + pc++; + inc_abs: + nz = ((opcode >> 4) & 2) - 1; + nz += READ( data ); + WRITE( data, (uint8_t) nz ); + goto inc_pc_loop; + +/* 7. SHIFT, ROTATION COMMANDS */ + + case 0x5C: /* LSR A */ + c = 0; + case 0x7C:{/* ROR A */ + nz = ((c >> 1) & 0x80) | (a >> 1); + c = a << 8; + a = nz; + goto loop; + } + + case 0x1C: /* ASL A */ + c = 0; + case 0x3C:{/* ROL A */ + int temp = (c >> 8) & 1; + c = a << 1; + nz = c | temp; + a = (uint8_t) nz; + goto loop; + } + + case 0x0B: /* ASL dp */ + c = 0; + data += dp; + goto rol_mem; + case 0x1B: /* ASL dp+X */ + c = 0; + case 0x3B: /* ROL dp+X */ + data = (uint8_t) (data + x); + case 0x2B: /* ROL dp */ + data += dp; + goto rol_mem; + case 0x0C: /* ASL abs */ + c = 0; + case 0x2C: /* ROL abs */ + data = READ_PC16( pc ); + pc++; + rol_mem: + nz = (c >> 8) & 1; + nz |= (c = READ( data ) << 1); + WRITE( data, (uint8_t) nz ); + goto inc_pc_loop; + + case 0x4B: /* LSR dp */ + c = 0; + data += dp; + goto ror_mem; + case 0x5B: /* LSR dp+X */ + c = 0; + case 0x7B: /* ROR dp+X */ + data = (uint8_t) (data + x); + case 0x6B: /* ROR dp */ + data += dp; + goto ror_mem; + case 0x4C: /* LSR abs */ + c = 0; + case 0x6C: /* ROR abs */ + data = READ_PC16( pc ); + pc++; + ror_mem: { + int temp = READ( data ); + nz = ((c >> 1) & 0x80) | (temp >> 1); + c = temp << 8; + WRITE( data, nz ); + goto inc_pc_loop; + } + + case 0x9F: /* XCN */ + nz = a = (a >> 4) | (uint8_t) (a << 4); + goto loop; + +/* 8. 16-BIT TRANSMISION COMMANDS */ + + case 0xBA: /* MOVW YA,dp */ + a = READ_DP( data ); + nz = (a & 0x7F) | (a >> 1); + y = READ_DP( (uint8_t) (data + 1) ); + nz |= y; + goto inc_pc_loop; + + case 0xDA: /* MOVW dp,YA */ + WRITE_DP( data, a ); + WRITE_DP( (uint8_t) (data + 1), y ); + goto inc_pc_loop; + +/* 9. 16-BIT OPERATION COMMANDS */ + + case 0x3A: /* INCW dp */ + case 0x1A:{/* DECW dp */ + data += dp; + + /* low byte */ + int temp = READ( data ); + temp += ((opcode >> 4) & 2) - 1; /* +1 for INCW, -1 for DECW */ + nz = ((temp >> 1) | temp) & 0x7F; + WRITE( data, (uint8_t) temp ); + + /* high byte */ + data = ((uint8_t) (data + 1)) + dp; + temp >>= 8; + temp = (uint8_t) (temp + READ( data )); + nz |= temp; + WRITE( data, temp ); + + goto inc_pc_loop; + } + + case 0x9A: /* SUBW YA,dp */ + case 0x7A: /* ADDW YA,dp */ + { + /* read 16-bit addend */ + int temp = READ_DP( data ); + int sign = READ_DP( (uint8_t) (data + 1) ); + temp += 0x100 * sign; + status &= ~(st_v | st_h); + + /* to do: fix half-carry for SUBW (it's probably wrong) */ + + /* for SUBW, negate and truncate to 16 bits */ + if ( opcode & 0x80 ) { + temp = (temp ^ 0xFFFF) + 1; + sign = temp >> 8; + } + + /* add low byte (A) */ + temp += a; + a = (uint8_t) temp; + nz = (temp | (temp >> 1)) & 0x7F; + + /* add high byte (Y) */ + temp >>= 8; + c = y + temp; + nz = (nz | c) & 0xFF; + + /* half-carry (temporary avoids CodeWarrior optimizer bug) */ + unsigned hc = (c & 15) - (y & 15); + status |= (hc >> 4) & st_h; + + /* overflow if sign of YA changed when previous sign + and addend sign were same */ + status |= (((c ^ y) & ~(y ^ sign)) >> 1) & st_v; + + y = (uint8_t) c; + + goto inc_pc_loop; + } + + case 0x5A: { /* CMPW YA,dp */ + int temp = a - READ_DP( data ); + nz = ((temp >> 1) | temp) & 0x7F; + temp = y + (temp >> 8); + temp -= READ_DP( (uint8_t) (data + 1) ); + nz |= temp; + c = ~temp; + nz &= 0xFF; + goto inc_pc_loop; + } + +/* 10. MULTIPLICATION & DIVISON COMMANDS */ + + case 0xCF: { /* MUL YA */ + unsigned temp = y * a; + a = (uint8_t) temp; + nz = ((temp >> 1) | temp) & 0x7F; + y = temp >> 8; + nz |= y; + goto loop; + } + + case 0x9E: /* DIV YA,X */ + { + /* behavior based on SPC CPU tests */ + + status &= ~(st_h | st_v); + + if ( (y & 15) >= (x & 15) ) + status |= st_h; + + if ( y >= x ) + status |= st_v; + + unsigned ya = y * 0x100 + a; + if ( y < x * 2 ) + { + a = ya / x; + y = ya - a * x; + } + else + { + a = 255 - (ya - x * 0x200) / (256 - x); + y = x + (ya - x * 0x200) % (256 - x); + } + + nz = (uint8_t) a; + a = (uint8_t) a; + + goto loop; + } + +/* 11. DECIMAL COMPENSATION COMMANDS */ + + /* seem unused */ + /* case 0xDF: */ /* DAA */ + /* case 0xBE: */ /* DAS */ + +/* 12. BRANCHING COMMANDS */ + + case 0x2F: /* BRA rel */ + pc += (int8_t) data; + goto inc_pc_loop; + + case 0x30: /* BMI */ + BRANCH( IS_NEG ) + + case 0x10: /* BPL */ + BRANCH( !IS_NEG ) + + case 0xB0: /* BCS */ + BRANCH( c & 0x100 ) + + case 0x90: /* BCC */ + BRANCH( !(c & 0x100) ) + + case 0x70: /* BVS */ + BRANCH( status & st_v ) + + case 0x50: /* BVC */ + BRANCH( !(status & st_v) ) + + case 0x03: /* BBS dp.bit,rel */ + case 0x23: + case 0x43: + case 0x63: + case 0x83: + case 0xA3: + case 0xC3: + case 0xE3: + pc++; + if ( (READ_DP( data ) >> (opcode >> 5)) & 1 ) + goto cbranch_taken_loop; + goto inc_pc_loop; + + case 0x13: /* BBC dp.bit,rel */ + case 0x33: + case 0x53: + case 0x73: + case 0x93: + case 0xB3: + case 0xD3: + case 0xF3: + pc++; + if ( !((READ_DP( data ) >> (opcode >> 5)) & 1) ) + goto cbranch_taken_loop; + goto inc_pc_loop; + + case 0xDE: /* CBNE dp+X,rel */ + data = (uint8_t) (data + x); + /* fall through */ + case 0x2E: /* CBNE dp,rel */ + pc++; + if ( READ_DP( data ) != a ) + goto cbranch_taken_loop; + goto inc_pc_loop; + + case 0xFE: /* DBNZ Y,rel */ + y = (uint8_t) (y - 1); + BRANCH( y ) + + case 0x6E: { /* DBNZ dp,rel */ + pc++; + unsigned temp = READ_DP( data ) - 1; + WRITE_DP( (uint8_t) data, (uint8_t) temp ); + if ( temp ) + goto cbranch_taken_loop; + goto inc_pc_loop; + } + + case 0x1F: /* JMP (abs+X) */ + SET_PC( READ_PC16( pc ) + x ); + /* fall through */ + case 0x5F: /* JMP abs */ + SET_PC( READ_PC16( pc ) ); + goto loop; + +/* 13. SUB-ROUTINE CALL RETURN COMMANDS */ + + case 0x0F:{/* BRK */ + check( 0 ); /* untested */ + PUSH16( GET_PC() + 1 ); + SET_PC( READ_PROG16( 0xFFDE ) ); /* vector address verified */ + int temp; + CALC_STATUS( temp ); + PUSH( temp ); + status = (status | st_b) & ~st_i; + goto loop; + } + + case 0x4F: /* PCALL offset */ + PUSH16( GET_PC() + 1 ); + SET_PC( 0xFF00 + data ); + goto loop; + + case 0x01: /* TCALL n */ + case 0x11: + case 0x21: + case 0x31: + case 0x41: + case 0x51: + case 0x61: + case 0x71: + case 0x81: + case 0x91: + case 0xA1: + case 0xB1: + case 0xC1: + case 0xD1: + case 0xE1: + case 0xF1: + PUSH16( GET_PC() ); + SET_PC( READ_PROG16( 0xFFDE - (opcode >> 3) ) ); + goto loop; + +/* 14. STACK OPERATION COMMANDS */ + + { + int temp; + case 0x7F: /* RET1 */ + temp = POP(); + SET_PC( POP() ); + pc += POP() << 8; + goto set_status; + case 0x8E: /* POP PSW */ + temp = POP(); + set_status: + SET_STATUS( temp ); + goto loop; + } + + case 0x0D: { /* PUSH PSW */ + int temp; + CALC_STATUS( temp ); + PUSH( temp ); + goto loop; + } + + case 0x2D: /* PUSH A */ + PUSH( a ); + goto loop; + + case 0x4D: /* PUSH X */ + PUSH( x ); + goto loop; + + case 0x6D: /* PUSH Y */ + PUSH( y ); + goto loop; + + case 0xAE: /* POP A */ + a = POP(); + goto loop; + + case 0xCE: /* POP X */ + x = POP(); + goto loop; + + case 0xEE: /* POP Y */ + y = POP(); + goto loop; + +/* 15. BIT OPERATION COMMANDS */ + + case 0x02: /* SET1 */ + case 0x22: + case 0x42: + case 0x62: + case 0x82: + case 0xA2: + case 0xC2: + case 0xE2: + case 0x12: /* CLR1 */ + case 0x32: + case 0x52: + case 0x72: + case 0x92: + case 0xB2: + case 0xD2: + case 0xF2: { + data += dp; + int bit = 1 << (opcode >> 5); + int mask = ~bit; + if ( opcode & 0x10 ) + bit = 0; + WRITE( data, (READ( data ) & mask) | bit ); + goto inc_pc_loop; + } + + case 0x0E: /* TSET1 abs */ + case 0x4E:{/* TCLR1 abs */ + data = READ_PC16( pc ); + pc += 2; + unsigned temp = READ( data ); + nz = temp & a; + temp &= ~a; + if ( !(opcode & 0x40) ) + temp |= a; + WRITE( data, temp ); + goto loop; + } + + case 0x4A: /* AND1 C,mem.bit */ + c &= MEM_BIT(); + pc += 2; + goto loop; + + case 0x6A: /* AND1 C,/mem.bit */ + check( 0 ); /* untested */ + c &= ~MEM_BIT(); + pc += 2; + goto loop; + + case 0x0A: /* OR1 C,mem.bit */ + check( 0 ); /* untested */ + c |= MEM_BIT(); + pc += 2; + goto loop; + + case 0x2A: /* OR1 C,/mem.bit */ + check( 0 ); /* untested */ + c |= ~MEM_BIT(); + pc += 2; + goto loop; + + case 0x8A: /* EOR1 C,mem.bit */ + c ^= MEM_BIT(); + pc += 2; + goto loop; + + case 0xEA: { /* NOT1 mem.bit */ + data = READ_PC16( pc ); + pc += 2; + unsigned temp = READ( data & 0x1FFF ); + temp ^= 1 << (data >> 13); + WRITE( data & 0x1FFF, temp ); + goto loop; + } + + case 0xCA: { /* MOV1 mem.bit,C */ + data = READ_PC16( pc ); + pc += 2; + unsigned temp = READ( data & 0x1FFF ); + unsigned bit = data >> 13; + temp = (temp & ~(1 << bit)) | (((c >> 8) & 1) << bit); + WRITE( data & 0x1FFF, temp ); + goto loop; + } + + case 0xAA: /* MOV1 C,mem.bit */ + c = MEM_BIT(); + pc += 2; + goto loop; + +/* 16. PROGRAM STATUS FLAG OPERATION COMMANDS */ + + case 0x60: /* CLRC */ + c = 0; + goto loop; + + case 0x80: /* SETC */ + c = ~0; + goto loop; + + case 0xED: /* NOTC */ + c ^= 0x100; + goto loop; + + case 0xE0: /* CLRV */ + status &= ~(st_v | st_h); + goto loop; + + case 0x20: /* CLRP */ + dp = 0; + goto loop; + + case 0x40: /* SETP */ + dp = 0x100; + goto loop; + + case 0xA0: /* EI */ + check( 0 ); /* untested */ + status |= st_i; + goto loop; + + case 0xC0: /* DI */ + check( 0 ); /* untested */ + status &= ~st_i; + goto loop; + +/* 17. OTHER COMMANDS */ + + case 0x00: /* NOP */ + goto loop; + + /*case 0xEF:*/ /* SLEEP */ + /*case 0xFF:*/ /* STOP */ + case 0xFF: + c |= 1; /* force switch table to have 256 entries, + hopefully helping optimizer */ + } /* switch */ + + /* unhandled instructions fall out of switch so emulator can catch them */ + +out_of_time: + /* undo partial execution of opcode */ + spc_time_ -= this->cycle_table [*--pc]; + { + int temp; + CALC_STATUS( temp ); + this->r.status = (uint8_t) temp; + } + + this->r.pc = GET_PC(); + this->r.sp = (uint8_t) GET_SP(); + this->r.a = (uint8_t) a; + this->r.x = (uint8_t) x; + this->r.y = (uint8_t) y; + +#if 0 + EXIT_TIMER(cpu); +#endif + return spc_time_; +} + +void CPU_Init( THIS ) +{ + ci->memcpy( this->cycle_table, cycle_table, sizeof cycle_table ); +} + diff --git a/lib/rbcodec/codecs/libspc/spc_dsp.c b/lib/rbcodec/codecs/libspc/spc_dsp.c new file mode 100644 index 0000000000..6350c4c331 --- /dev/null +++ b/lib/rbcodec/codecs/libspc/spc_dsp.c @@ -0,0 +1,1594 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2007-2008 Michael Sevakis (jhMikeS) + * Copyright (C) 2006-2007 Adam Gashlin (hcs) + * Copyright (C) 2004-2007 Shay Green (blargg) + * Copyright (C) 2002 Brad Martin + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +/* The DSP portion (awe!) */ +#include "codeclib.h" +#include "spc_codec.h" +#include "spc_profiler.h" + +#if defined(CPU_COLDFIRE) || defined (CPU_ARM) +int32_t fir_buf[FIR_BUF_CNT] IBSS_ATTR_SPC + __attribute__((aligned(FIR_BUF_ALIGN*1))); +#endif +#if SPC_BRRCACHE +/* a little extra for samples that go past end */ +int16_t BRRcache [BRR_CACHE_SIZE] CACHEALIGN_ATTR; +#endif + +void DSP_write( struct Spc_Dsp* this, int i, int data ) +{ + assert( (unsigned) i < REGISTER_COUNT ); + + this->r.reg [i] = data; + int high = i >> 4; + int low = i & 0x0F; + if ( low < 2 ) /* voice volumes */ + { + int left = *(int8_t const*) &this->r.reg [i & ~1]; + int right = *(int8_t const*) &this->r.reg [i | 1]; + struct voice_t* v = this->voice_state + high; + v->volume [0] = left; + v->volume [1] = right; + } + else if ( low == 0x0F ) /* fir coefficients */ + { + this->fir_coeff [7 - high] = (int8_t) data; /* sign-extend */ + } +} + +#define CLAMP16( n ) clip_sample_16( n ) + +#if SPC_BRRCACHE +static void decode_brr( struct Spc_Dsp* this, unsigned start_addr, + struct voice_t* voice, + struct raw_voice_t const* const raw_voice ) ICODE_ATTR_SPC; +static void decode_brr( struct Spc_Dsp* this, unsigned start_addr, + struct voice_t* voice, + struct raw_voice_t const* const raw_voice ) +{ + /* setup same variables as where decode_brr() is called from */ + #undef RAM + #define RAM ram.ram + + struct src_dir const* const sd = + &ram.sd[this->r.g.wave_page * 0x100/sizeof(struct src_dir)]; + struct cache_entry_t* const wave_entry = + &this->wave_entry [raw_voice->waveform]; + + /* the following block can be put in place of the call to + decode_brr() below + */ + { + DEBUGF( "decode at %08x (wave #%d)\n", + start_addr, raw_voice->waveform ); + + /* see if in cache */ + int i; + for ( i = 0; i < this->oldsize; i++ ) + { + struct cache_entry_t* e = &this->wave_entry_old [i]; + if ( e->start_addr == start_addr ) + { + DEBUGF( "found in wave_entry_old (oldsize=%d)\n", + this->oldsize ); + *wave_entry = *e; + goto wave_in_cache; + } + } + + wave_entry->start_addr = start_addr; + + uint8_t const* const loop_ptr = + RAM + letoh16(sd[raw_voice->waveform].loop); + short* loop_start = 0; + + short* out = BRRcache + start_addr * 2; + wave_entry->samples = out; + *out++ = 0; + int smp1 = 0; + int smp2 = 0; + + uint8_t const* addr = RAM + start_addr; + int block_header; + do + { + if ( addr == loop_ptr ) + { + loop_start = out; + DEBUGF( "loop at %08lx (wave #%d)\n", + (unsigned long)(addr - RAM), raw_voice->waveform ); + } + + /* header */ + block_header = *addr; + addr += 9; + voice->addr = addr; + int const filter = (block_header & 0x0C) - 0x08; + + /* scaling + (invalid scaling gives -4096 for neg nybble, 0 for pos) */ + static unsigned char const right_shifts [16] = { + 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 29, 29, 29, + }; + static unsigned char const left_shifts [16] = { + 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11, 11, 11 + }; + int const scale = block_header >> 4; + int const right_shift = right_shifts [scale]; + int const left_shift = left_shifts [scale]; + + /* output position */ + out += BRR_BLOCK_SIZE; + int offset = -BRR_BLOCK_SIZE << 2; + + do /* decode and filter 16 samples */ + { + /* Get nybble, sign-extend, then scale + get byte, select which nybble, sign-extend, then shift based + on scaling. also handles invalid scaling values. */ + int delta = (int) (int8_t) (addr [offset >> 3] << (offset & 4)) + >> right_shift << left_shift; + + out [offset >> 2] = smp2; + + if ( filter == 0 ) /* mode 0x08 (30-90% of the time) */ + { + delta -= smp2 >> 1; + delta += smp2 >> 5; + smp2 = smp1; + delta += smp1; + delta += (-smp1 - (smp1 >> 1)) >> 5; + } + else + { + if ( filter == -4 ) /* mode 0x04 */ + { + delta += smp1 >> 1; + delta += (-smp1) >> 5; + } + else if ( filter > -4 ) /* mode 0x0C */ + { + delta -= smp2 >> 1; + delta += (smp2 + (smp2 >> 1)) >> 4; + delta += smp1; + delta += (-smp1 * 13) >> 7; + } + smp2 = smp1; + } + + delta = CLAMP16( delta ); + smp1 = (int16_t) (delta * 2); /* sign-extend */ + } + while ( (offset += 4) != 0 ); + + /* if next block has end flag set, this block ends early */ + /* (verified) */ + if ( (block_header & 3) != 3 && (*addr & 3) == 1 ) + { + /* skip last 9 samples */ + out -= 9; + goto early_end; + } + } + while ( !(block_header & 1) && addr < RAM + 0x10000 ); + + out [0] = smp2; + out [1] = smp1; + + early_end: + wave_entry->end = (out - 1 - wave_entry->samples) << 12; + + wave_entry->loop = 0; + if ( (block_header & 2) ) + { + if ( loop_start ) + { + int loop = out - loop_start; + wave_entry->loop = loop; + wave_entry->end += 0x3000; + out [2] = loop_start [2]; + out [3] = loop_start [3]; + out [4] = loop_start [4]; + } + else + { + DEBUGF( "loop point outside initial wave\n" ); + } + } + + DEBUGF( "end at %08lx (wave #%d)\n", + (unsigned long)(addr - RAM), raw_voice->waveform ); + + /* add to cache */ + this->wave_entry_old [this->oldsize++] = *wave_entry; +wave_in_cache:; + } +} +#endif + +static void key_on(struct Spc_Dsp* const this, struct voice_t* const voice, + struct src_dir const* const sd, + struct raw_voice_t const* const raw_voice, + const int key_on_delay, const int vbit) ICODE_ATTR_SPC; +static void key_on(struct Spc_Dsp* const this, struct voice_t* const voice, + struct src_dir const* const sd, + struct raw_voice_t const* const raw_voice, + const int key_on_delay, const int vbit) { + #undef RAM + #define RAM ram.ram + int const env_rate_init = 0x7800; + voice->key_on_delay = key_on_delay; + if ( key_on_delay == 0 ) + { + this->keys_down |= vbit; + voice->envx = 0; + voice->env_mode = state_attack; + voice->env_timer = env_rate_init; /* TODO: inaccurate? */ + unsigned start_addr = letoh16(sd[raw_voice->waveform].start); + #if !SPC_BRRCACHE + { + voice->addr = RAM + start_addr; + /* BRR filter uses previous samples */ + voice->samples [BRR_BLOCK_SIZE + 1] = 0; + voice->samples [BRR_BLOCK_SIZE + 2] = 0; + /* decode three samples immediately */ + voice->position = (BRR_BLOCK_SIZE + 3) * 0x1000 - 1; + voice->block_header = 0; /* "previous" BRR header */ + } + #else + { + voice->position = 3 * 0x1000 - 1; + struct cache_entry_t* const wave_entry = + &this->wave_entry [raw_voice->waveform]; + + /* predecode BRR if not already */ + if ( wave_entry->start_addr != start_addr ) + { + /* the following line can be replaced by the indicated block + in decode_brr() */ + decode_brr( this, start_addr, voice, raw_voice ); + } + + voice->samples = wave_entry->samples; + voice->wave_end = wave_entry->end; + voice->wave_loop = wave_entry->loop; + } + #endif + } +} + +void DSP_run_( struct Spc_Dsp* this, long count, int32_t* out_buf ) +{ + #undef RAM +#if defined(CPU_ARM) && !SPC_BRRCACHE + uint8_t* const ram_ = ram.ram; + #define RAM ram_ +#else + #define RAM ram.ram +#endif +#if 0 + EXIT_TIMER(cpu); + ENTER_TIMER(dsp); +#endif + + /* Here we check for keys on/off. Docs say that successive writes + to KON/KOF must be separated by at least 2 Ts periods or risk + being neglected. Therefore DSP only looks at these during an + update, and not at the time of the write. Only need to do this + once however, since the regs haven't changed over the whole + period we need to catch up with. */ + + { + int key_ons = this->r.g.key_ons; + int key_offs = this->r.g.key_offs; + /* keying on a voice resets that bit in ENDX */ + this->r.g.wave_ended &= ~key_ons; + /* key_off bits prevent key_on from being acknowledged */ + this->r.g.key_ons = key_ons & key_offs; + + /* process key events outside loop, since they won't re-occur */ + struct voice_t* voice = this->voice_state + 8; + int vbit = 0x80; + do + { + --voice; + if ( key_offs & vbit ) + { + voice->env_mode = state_release; + voice->key_on_delay = 0; + } + else if ( key_ons & vbit ) + { + voice->key_on_delay = 8; + } + } + while ( (vbit >>= 1) != 0 ); + } + + struct src_dir const* const sd = + &ram.sd[this->r.g.wave_page * 0x100/sizeof(struct src_dir)]; + + #ifdef ROCKBOX_BIG_ENDIAN + /* Convert endiannesses before entering loops - these + get used alot */ + const uint32_t rates[VOICE_COUNT] = + { + GET_LE16A( this->r.voice[0].rate ) & 0x3FFF, + GET_LE16A( this->r.voice[1].rate ) & 0x3FFF, + GET_LE16A( this->r.voice[2].rate ) & 0x3FFF, + GET_LE16A( this->r.voice[3].rate ) & 0x3FFF, + GET_LE16A( this->r.voice[4].rate ) & 0x3FFF, + GET_LE16A( this->r.voice[5].rate ) & 0x3FFF, + GET_LE16A( this->r.voice[6].rate ) & 0x3FFF, + GET_LE16A( this->r.voice[7].rate ) & 0x3FFF, + }; + #define VOICE_RATE(x) *(x) + #define IF_RBE(...) __VA_ARGS__ + #ifdef CPU_COLDFIRE + /* Initialize mask register with the buffer address mask */ + asm volatile ("move.l %[m], %%mask" : : [m]"i"(FIR_BUF_MASK)); + const int echo_wrap = (this->r.g.echo_delay & 15) * 0x800; + const int echo_start = this->r.g.echo_page * 0x100; + #endif /* CPU_COLDFIRE */ + #else + #define VOICE_RATE(x) (GET_LE16(raw_voice->rate) & 0x3FFF) + #define IF_RBE(...) + #endif /* ROCKBOX_BIG_ENDIAN */ + +#if !SPC_NOINTERP + int const slow_gaussian = (this->r.g.pitch_mods >> 1) | + this->r.g.noise_enables; +#endif + /* (g.flags & 0x40) ? 30 : 14 */ + int const global_muting = ((this->r.g.flags & 0x40) >> 2) + 14 - 8; + int const global_vol_0 = this->r.g.volume_0; + int const global_vol_1 = this->r.g.volume_1; + + /* each rate divides exactly into 0x7800 without remainder */ + int const env_rate_init = 0x7800; + static unsigned short const env_rates [0x20] ICONST_ATTR_SPC = + { + 0x0000, 0x000F, 0x0014, 0x0018, 0x001E, 0x0028, 0x0030, 0x003C, + 0x0050, 0x0060, 0x0078, 0x00A0, 0x00C0, 0x00F0, 0x0140, 0x0180, + 0x01E0, 0x0280, 0x0300, 0x03C0, 0x0500, 0x0600, 0x0780, 0x0A00, + 0x0C00, 0x0F00, 0x1400, 0x1800, 0x1E00, 0x2800, 0x3C00, 0x7800 + }; + + do /* one pair of output samples per iteration */ + { + /* Noise */ + if ( this->r.g.noise_enables ) + { + if ( (this->noise_count -= + env_rates [this->r.g.flags & 0x1F]) <= 0 ) + { + this->noise_count = env_rate_init; + int feedback = (this->noise << 13) ^ (this->noise << 14); + this->noise = (feedback & 0x8000) ^ (this->noise >> 1 & ~1); + } + } + +#if !SPC_NOECHO + int echo_0 = 0; + int echo_1 = 0; +#endif + long prev_outx = 0; /* TODO: correct value for first channel? */ + int chans_0 = 0; + int chans_1 = 0; + /* TODO: put raw_voice pointer in voice_t? */ + struct raw_voice_t * raw_voice = this->r.voice; + struct voice_t* voice = this->voice_state; + int vbit = 1; + IF_RBE( const uint32_t* vr = rates; ) + for ( ; vbit < 0x100; vbit <<= 1, ++voice, ++raw_voice IF_RBE( , ++vr ) ) + { + /* pregen involves checking keyon, etc */ +#if 0 + ENTER_TIMER(dsp_pregen); +#endif + + /* Key on events are delayed */ + int key_on_delay = voice->key_on_delay; + + if ( UNLIKELY ( --key_on_delay >= 0 ) ) /* <1% of the time */ + { + key_on(this,voice,sd,raw_voice,key_on_delay,vbit); + } + + if ( !(this->keys_down & vbit) ) /* Silent channel */ + { + silent_chan: + raw_voice->envx = 0; + raw_voice->outx = 0; + prev_outx = 0; + continue; + } + + /* Envelope */ + { + int const ENV_RANGE = 0x800; + int env_mode = voice->env_mode; + int adsr0 = raw_voice->adsr [0]; + int env_timer; + if ( LIKELY ( env_mode != state_release ) ) /* 99% of the time */ + { + env_timer = voice->env_timer; + if ( LIKELY ( adsr0 & 0x80 ) ) /* 79% of the time */ + { + int adsr1 = raw_voice->adsr [1]; + if ( LIKELY ( env_mode == state_sustain ) ) /* 74% of the time */ + { + if ( (env_timer -= env_rates [adsr1 & 0x1F]) > 0 ) + goto write_env_timer; + + int envx = voice->envx; + envx--; /* envx *= 255 / 256 */ + envx -= envx >> 8; + voice->envx = envx; + /* TODO: should this be 8? */ + raw_voice->envx = envx >> 4; + goto init_env_timer; + } + else if ( env_mode < 0 ) /* 25% state_decay */ + { + int envx = voice->envx; + if ( (env_timer -= + env_rates [(adsr0 >> 3 & 0x0E) + 0x10]) <= 0 ) + { + envx--; /* envx *= 255 / 256 */ + envx -= envx >> 8; + voice->envx = envx; + /* TODO: should this be 8? */ + raw_voice->envx = envx >> 4; + env_timer = env_rate_init; + } + + int sustain_level = adsr1 >> 5; + if ( envx <= (sustain_level + 1) * 0x100 ) + voice->env_mode = state_sustain; + + goto write_env_timer; + } + else /* state_attack */ + { + int t = adsr0 & 0x0F; + if ( (env_timer -= env_rates [t * 2 + 1]) > 0 ) + goto write_env_timer; + + int envx = voice->envx; + + int const step = ENV_RANGE / 64; + envx += step; + if ( t == 15 ) + envx += ENV_RANGE / 2 - step; + + if ( envx >= ENV_RANGE ) + { + envx = ENV_RANGE - 1; + voice->env_mode = state_decay; + } + voice->envx = envx; + /* TODO: should this be 8? */ + raw_voice->envx = envx >> 4; + goto init_env_timer; + } + } + else /* gain mode */ + { + int t = raw_voice->gain; + if ( t < 0x80 ) + { + raw_voice->envx = t; + voice->envx = t << 4; + goto env_end; + } + else + { + if ( (env_timer -= env_rates [t & 0x1F]) > 0 ) + goto write_env_timer; + + int envx = voice->envx; + int mode = t >> 5; + if ( mode <= 5 ) /* decay */ + { + int step = ENV_RANGE / 64; + if ( mode == 5 ) /* exponential */ + { + envx--; /* envx *= 255 / 256 */ + step = envx >> 8; + } + if ( (envx -= step) < 0 ) + { + envx = 0; + if ( voice->env_mode == state_attack ) + voice->env_mode = state_decay; + } + } + else /* attack */ + { + int const step = ENV_RANGE / 64; + envx += step; + if ( mode == 7 && + envx >= ENV_RANGE * 3 / 4 + step ) + envx += ENV_RANGE / 256 - step; + + if ( envx >= ENV_RANGE ) + envx = ENV_RANGE - 1; + } + voice->envx = envx; + /* TODO: should this be 8? */ + raw_voice->envx = envx >> 4; + goto init_env_timer; + } + } + } + else /* state_release */ + { + int envx = voice->envx; + if ( (envx -= ENV_RANGE / 256) > 0 ) + { + voice->envx = envx; + raw_voice->envx = envx >> 8; + goto env_end; + } + else + { + /* bit was set, so this clears it */ + this->keys_down ^= vbit; + voice->envx = 0; + goto silent_chan; + } + } + init_env_timer: + env_timer = env_rate_init; + write_env_timer: + voice->env_timer = env_timer; + env_end:; + } +#if 0 + EXIT_TIMER(dsp_pregen); + + ENTER_TIMER(dsp_gen); +#endif + #if !SPC_BRRCACHE + /* Decode BRR block */ + if ( voice->position >= BRR_BLOCK_SIZE * 0x1000 ) + { + voice->position -= BRR_BLOCK_SIZE * 0x1000; + + uint8_t const* addr = voice->addr; + if ( addr >= RAM + 0x10000 ) + addr -= 0x10000; + + /* action based on previous block's header */ + if ( voice->block_header & 1 ) + { + addr = RAM + letoh16(sd[raw_voice->waveform].loop); + this->r.g.wave_ended |= vbit; + if ( !(voice->block_header & 2) ) /* 1% of the time */ + { + /* first block was end block; + don't play anything (verified) */ + /* bit was set, so this clears it */ + this->keys_down ^= vbit; + + /* since voice->envx is 0, + samples and position don't matter */ + raw_voice->envx = 0; + voice->envx = 0; + goto skip_decode; + } + } + + /* header */ + int const block_header = *addr; + addr += 9; + voice->addr = addr; + voice->block_header = block_header; + + /* previous samples */ + int smp2 = voice->samples [BRR_BLOCK_SIZE + 1]; + int smp1 = voice->samples [BRR_BLOCK_SIZE + 2]; + voice->samples [0] = voice->samples [BRR_BLOCK_SIZE]; + + /* output position */ + short* out = voice->samples + (1 + BRR_BLOCK_SIZE); + int offset = -BRR_BLOCK_SIZE << 2; + + /* if next block has end flag set, + this block ends early (verified) */ + if ( (block_header & 3) != 3 && (*addr & 3) == 1 ) + { + /* arrange for last 9 samples to be skipped */ + int const skip = 9; + out += (skip & 1); + voice->samples [skip] = voice->samples [BRR_BLOCK_SIZE]; + voice->position += skip * 0x1000; + offset = (-BRR_BLOCK_SIZE + (skip & ~1)) << 2; + addr -= skip / 2; + /* force sample to end on next decode */ + voice->block_header = 1; + } + + int const filter = block_header & 0x0c; + int const scale = block_header >> 4; + + if ( filter == 0x08 ) /* filter 2 (30-90% of the time) */ + { + /* y[n] = x[n] + 61/32 * y[n-1] - 15/16 * y[n-2] */ + do /* decode and filter 16 samples */ + { + /* Get nybble, sign-extend, then scale + get byte, select which nybble, sign-extend, then shift + based on scaling. */ + int delta = (int8_t)(addr [offset >> 3] << (offset & 4)) >> 4; + delta = (delta << scale) >> 1; + + if (scale > 0xc) + delta = (delta >> 17) << 11; + + out [offset >> 2] = smp2; + + delta -= smp2 >> 1; + delta += smp2 >> 5; + delta += smp1; + delta += (-smp1 - (smp1 >> 1)) >> 5; + + delta = CLAMP16( delta ); + smp2 = smp1; + smp1 = (int16_t) (delta * 2); /* sign-extend */ + } + while ( (offset += 4) != 0 ); + } + else if ( filter == 0x04 ) /* filter 1 */ + { + /* y[n] = x[n] + 15/16 * y[n-1] */ + do /* decode and filter 16 samples */ + { + /* Get nybble, sign-extend, then scale + get byte, select which nybble, sign-extend, then shift + based on scaling. */ + int delta = (int8_t)(addr [offset >> 3] << (offset & 4)) >> 4; + delta = (delta << scale) >> 1; + + if (scale > 0xc) + delta = (delta >> 17) << 11; + + out [offset >> 2] = smp2; + + delta += smp1 >> 1; + delta += (-smp1) >> 5; + + delta = CLAMP16( delta ); + smp2 = smp1; + smp1 = (int16_t) (delta * 2); /* sign-extend */ + } + while ( (offset += 4) != 0 ); + } + else if ( filter == 0x0c ) /* filter 3 */ + { + /* y[n] = x[n] + 115/64 * y[n-1] - 13/16 * y[n-2] */ + do /* decode and filter 16 samples */ + { + /* Get nybble, sign-extend, then scale + get byte, select which nybble, sign-extend, then shift + based on scaling. */ + int delta = (int8_t)(addr [offset >> 3] << (offset & 4)) >> 4; + delta = (delta << scale) >> 1; + + if (scale > 0xc) + delta = (delta >> 17) << 11; + + out [offset >> 2] = smp2; + + delta -= smp2 >> 1; + delta += (smp2 + (smp2 >> 1)) >> 4; + delta += smp1; + delta += (-smp1 * 13) >> 7; + + delta = CLAMP16( delta ); + smp2 = smp1; + smp1 = (int16_t) (delta * 2); /* sign-extend */ + } + while ( (offset += 4) != 0 ); + } + else /* filter 0 */ + { + /* y[n] = x[n] */ + do /* decode and filter 16 samples */ + { + /* Get nybble, sign-extend, then scale + get byte, select which nybble, sign-extend, then shift + based on scaling. */ + int delta = (int8_t)(addr [offset >> 3] << (offset & 4)) >> 4; + delta = (delta << scale) >> 1; + + if (scale > 0xc) + delta = (delta >> 17) << 11; + + out [offset >> 2] = smp2; + + smp2 = smp1; + smp1 = delta * 2; + } + while ( (offset += 4) != 0 ); + } + + out [0] = smp2; + out [1] = smp1; + + skip_decode:; + } + #endif /* !SPC_BRRCACHE */ + /* Get rate (with possible modulation) */ + int rate = VOICE_RATE(vr); + if ( this->r.g.pitch_mods & vbit ) + rate = (rate * (prev_outx + 32768)) >> 15; + + #if !SPC_NOINTERP + /* Interleved gauss table (to improve cache coherency). */ + /* gauss [i * 2 + j] = normal_gauss [(1 - j) * 256 + i] */ + static short const gauss [512] ICONST_ATTR_SPC MEM_ALIGN_ATTR = + { +370,1305, 366,1305, 362,1304, 358,1304, 354,1304, 351,1304, 347,1304, 343,1303, +339,1303, 336,1303, 332,1302, 328,1302, 325,1301, 321,1300, 318,1300, 314,1299, +311,1298, 307,1297, 304,1297, 300,1296, 297,1295, 293,1294, 290,1293, 286,1292, +283,1291, 280,1290, 276,1288, 273,1287, 270,1286, 267,1284, 263,1283, 260,1282, +257,1280, 254,1279, 251,1277, 248,1275, 245,1274, 242,1272, 239,1270, 236,1269, +233,1267, 230,1265, 227,1263, 224,1261, 221,1259, 218,1257, 215,1255, 212,1253, +210,1251, 207,1248, 204,1246, 201,1244, 199,1241, 196,1239, 193,1237, 191,1234, +188,1232, 186,1229, 183,1227, 180,1224, 178,1221, 175,1219, 173,1216, 171,1213, +168,1210, 166,1207, 163,1205, 161,1202, 159,1199, 156,1196, 154,1193, 152,1190, +150,1186, 147,1183, 145,1180, 143,1177, 141,1174, 139,1170, 137,1167, 134,1164, +132,1160, 130,1157, 128,1153, 126,1150, 124,1146, 122,1143, 120,1139, 118,1136, +117,1132, 115,1128, 113,1125, 111,1121, 109,1117, 107,1113, 106,1109, 104,1106, +102,1102, 100,1098, 99,1094, 97,1090, 95,1086, 94,1082, 92,1078, 90,1074, + 89,1070, 87,1066, 86,1061, 84,1057, 83,1053, 81,1049, 80,1045, 78,1040, + 77,1036, 76,1032, 74,1027, 73,1023, 71,1019, 70,1014, 69,1010, 67,1005, + 66,1001, 65, 997, 64, 992, 62, 988, 61, 983, 60, 978, 59, 974, 58, 969, + 56, 965, 55, 960, 54, 955, 53, 951, 52, 946, 51, 941, 50, 937, 49, 932, + 48, 927, 47, 923, 46, 918, 45, 913, 44, 908, 43, 904, 42, 899, 41, 894, + 40, 889, 39, 884, 38, 880, 37, 875, 36, 870, 36, 865, 35, 860, 34, 855, + 33, 851, 32, 846, 32, 841, 31, 836, 30, 831, 29, 826, 29, 821, 28, 816, + 27, 811, 27, 806, 26, 802, 25, 797, 24, 792, 24, 787, 23, 782, 23, 777, + 22, 772, 21, 767, 21, 762, 20, 757, 20, 752, 19, 747, 19, 742, 18, 737, + 17, 732, 17, 728, 16, 723, 16, 718, 15, 713, 15, 708, 15, 703, 14, 698, + 14, 693, 13, 688, 13, 683, 12, 678, 12, 674, 11, 669, 11, 664, 11, 659, + 10, 654, 10, 649, 10, 644, 9, 640, 9, 635, 9, 630, 8, 625, 8, 620, + 8, 615, 7, 611, 7, 606, 7, 601, 6, 596, 6, 592, 6, 587, 6, 582, + 5, 577, 5, 573, 5, 568, 5, 563, 4, 559, 4, 554, 4, 550, 4, 545, + 4, 540, 3, 536, 3, 531, 3, 527, 3, 522, 3, 517, 2, 513, 2, 508, + 2, 504, 2, 499, 2, 495, 2, 491, 2, 486, 1, 482, 1, 477, 1, 473, + 1, 469, 1, 464, 1, 460, 1, 456, 1, 451, 1, 447, 1, 443, 1, 439, + 0, 434, 0, 430, 0, 426, 0, 422, 0, 418, 0, 414, 0, 410, 0, 405, + 0, 401, 0, 397, 0, 393, 0, 389, 0, 385, 0, 381, 0, 378, 0, 374, + }; + /* Gaussian interpolation using most recent 4 samples */ + long position = voice->position; + voice->position += rate; + short const* interp = voice->samples + (position >> 12); + int offset = position >> 4 & 0xFF; + + /* Only left half of gaussian kernel is in table, so we must mirror + for right half */ + short const* fwd = gauss + offset * 2; + short const* rev = gauss + 510 - offset * 2; + + /* Use faster gaussian interpolation when exact result isn't needed + by pitch modulator of next channel */ + int amp_0, amp_1; /* Also serve as temps _0, and _1 */ + if ( LIKELY ( !(slow_gaussian & vbit) ) ) /* 99% of the time */ + { + /* Main optimization is lack of clamping. Not a problem since + output never goes more than +/- 16 outside 16-bit range and + things are clamped later anyway. Other optimization is to + preserve fractional accuracy, eliminating several masks. */ + #if defined (CPU_ARM) + int output; + int _2, _3; /* All-purpose temps */ + /* Multiple ASM blocks keep regs free and reduce result + * latency issues. */ + #if ARM_ARCH >= 6 + /* Interpolate */ + asm volatile ( + "ldr %[_0], [%[interp]] \r\n" /* _0=i0i1 */ + "ldr %[_2], [%[fwd]] \r\n" /* _2=f0f1 */ + "ldr %[_1], [%[interp], #4] \r\n" /* _1=i2i3 */ + "ldr %[_3], [%[rev]] \r\n" /* _3=r0r1 */ + "smuad %[out], %[_0], %[_2] \r\n" /* out=f0*i0 + f1*i1 */ + "smladx %[out], %[_1], %[_3], %[out] \r\n" /* out+=r1*i2 + r0*i3 */ + : [out]"=r"(output), + [_0]"=&r"(amp_0), [_1]"=&r"(amp_1), + [_2]"=&r"(_2), [_3]"=r"(_3) + : [fwd]"r"(fwd), [rev]"r"(rev), + [interp]"r"(interp)); + /* Apply voice envelope */ + asm volatile ( + "mov %[_2], %[out], asr #(11-5) \r\n" /* To do >> 16 later */ + "mul %[out], %[_2], %[envx] \r\n" /* and avoid exp. shift */ + : [out]"+r"(output), [_2]"=&r"(_2) + : [envx]"r"((int)voice->envx)); + /* Apply left and right volume */ + asm volatile ( + "smulwb %[amp_0], %[out], %[vvol_0] \r\n" /* (32x16->48)[47:16]->[31:0] */ + "smulwb %[amp_1], %[out], %[vvol_1] \r\n" + : [out]"+r"(output), + [amp_0]"=&r"(amp_0), [amp_1]"=r"(amp_1) + : [vvol_0]"r"(voice->volume[0]), + [vvol_1]"r"(voice->volume[1])); + + raw_voice->outx = output >> (8+5); /* 'output' still 5 bits too big */ + #else /* ARM_ARCH < 6 */ + /* Perform gaussian interpolation on four samples */ + asm volatile ( + "ldrsh %[_0], [%[interp]] \r\n" + "ldrsh %[_2], [%[fwd]] \r\n" + "ldrsh %[_1], [%[interp], #2] \r\n" + "ldrsh %[_3], [%[fwd], #2] \r\n" + "mul %[out], %[_0], %[_2] \r\n" /* out= fwd[0]*interp[0] */ + "ldrsh %[_0], [%[interp], #4] \r\n" + "ldrsh %[_2], [%[rev], #2] \r\n" + "mla %[out], %[_1], %[_3], %[out] \r\n" /* out+=fwd[1]*interp[1] */ + "ldrsh %[_1], [%[interp], #6] \r\n" + "ldrsh %[_3], [%[rev]] \r\n" + "mla %[out], %[_0], %[_2], %[out] \r\n" /* out+=rev[1]*interp[2] */ + "mla %[out], %[_1], %[_3], %[out] \r\n" /* out+=rev[0]*interp[3] */ + : [out]"=&r"(output), + [_0]"=&r"(amp_0), [_1]"=&r"(amp_1), + [_2]"=&r"(_2), [_3]"=&r"(_3) + : [fwd]"r"(fwd), [rev]"r"(rev), + [interp]"r"(interp)); + /* Apply voice envelope */ + asm volatile ( + "mov %[_2], %[out], asr #11 \r\n" + "mul %[out], %[_2], %[envx] \r\n" + : [out]"+r"(output), [_2]"=&r"(_2) + : [envx]"r"((int)voice->envx)); + /* Reduce and apply left and right volume */ + asm volatile ( + "mov %[out], %[out], asr #11 \r\n" + "mul %[amp_0], %[out], %[vvol_0] \r\n" + "mul %[amp_1], %[out], %[vvol_1] \r\n" + : [out]"+r"(output), + [amp_0]"=&r"(amp_0), [amp_1]"=r"(amp_1) + : [vvol_0]"r"((int)voice->volume[0]), + [vvol_1]"r"((int)voice->volume[1])); + + raw_voice->outx = output >> 8; + #endif /* ARM_ARCH */ + #else /* Unoptimized CPU */ + int output = (((fwd [0] * interp [0] + + fwd [1] * interp [1] + + rev [1] * interp [2] + + rev [0] * interp [3] ) >> 11) * voice->envx) >> 11; + + /* duplicated here to give compiler more to run in parallel */ + amp_0 = voice->volume [0] * output; + amp_1 = voice->volume [1] * output; + + raw_voice->outx = output >> 8; + #endif /* CPU_* */ + } + else /* slow gaussian */ + { + #if defined(CPU_ARM) + #if ARM_ARCH >= 6 + int output = *(int16_t*) &this->noise; + + if ( !(this->r.g.noise_enables & vbit) ) + { + /* Interpolate */ + int _2, _3; + asm volatile ( + /* NOTE: often-unaligned accesses */ + "ldr %[_0], [%[interp]] \r\n" /* _0=i0i1 */ + "ldr %[_2], [%[fwd]] \r\n" /* _2=f0f1 */ + "ldr %[_1], [%[interp], #4] \r\n" /* _1=i2i3 */ + "ldr %[_3], [%[rev]] \r\n" /* _3=f2f3 */ + "smulbb %[out], %[_0], %[_2] \r\n" /* out=f0*i0 */ + "smultt %[_0], %[_0], %[_2] \r\n" /* _0=f1*i1 */ + "smulbt %[_2], %[_1], %[_3] \r\n" /* _2=r1*i2 */ + "smultb %[_3], %[_1], %[_3] \r\n" /* _3=r0*i3 */ + : [out]"=r"(output), + [_0]"=&r"(amp_0), [_1]"=&r"(amp_1), + [_2]"=&r"(_2), [_3]"=r"(_3) + : [fwd]"r"(fwd), [rev]"r"(rev), + [interp]"r"(interp)); + asm volatile ( + "mov %[out], %[out], asr#12 \r\n" + "add %[_0], %[out], %[_0], asr #12 \r\n" + "add %[_2], %[_0], %[_2], asr #12 \r\n" + "pkhbt %[_0], %[_2], %[_3], asl #4 \r\n" /* _3[31:16], _2[15:0] */ + "sadd16 %[_0], %[_0], %[_0] \r\n" /* _3[31:16]*2, _2[15:0]*2 */ + "qsubaddx %[out], %[_0], %[_0] \r\n" /* out[15:0]= + * sat16(_3[31:16]+_2[15:0]) */ + : [out]"+r"(output), + [_0]"+r"(amp_0), [_2]"+r"(_2), [_3]"+r"(_3)); + } + /* Apply voice envelope */ + asm volatile ( + "smulbb %[out], %[out], %[envx] \r\n" + : [out]"+r"(output) + : [envx]"r"(voice->envx)); + /* Reduce and apply left and right volume */ + asm volatile ( + "mov %[out], %[out], asr #11 \r\n" + "bic %[out], %[out], #0x1 \r\n" + "mul %[amp_0], %[out], %[vvol_0] \r\n" + "mul %[amp_1], %[out], %[vvol_1] \r\n" + : [out]"+r"(output), + [amp_0]"=&r"(amp_0), [amp_1]"=r"(amp_1) + : [vvol_0]"r"((int)voice->volume[0]), + [vvol_1]"r"((int)voice->volume[1])); + + prev_outx = output; + raw_voice->outx = output >> 8; + #else /* ARM_ARCH < 6 */ + int output = *(int16_t*) &this->noise; + + if ( !(this->r.g.noise_enables & vbit) ) + { + /* Interpolate */ + int _2, _3; + asm volatile ( + "ldrsh %[_0], [%[interp]] \r\n" + "ldrsh %[_2], [%[fwd]] \r\n" + "ldrsh %[_1], [%[interp], #2] \r\n" + "ldrsh %[_3], [%[fwd], #2] \r\n" + "mul %[out], %[_2], %[_0] \r\n" /* fwd[0]*interp[0] */ + "ldrsh %[_2], [%[rev], #2] \r\n" + "mul %[_0], %[_3], %[_1] \r\n" /* fwd[1]*interp[1] */ + "ldrsh %[_1], [%[interp], #4] \r\n" + "mov %[out], %[out], asr #12 \r\n" + "ldrsh %[_3], [%[rev]] \r\n" + "mul %[_2], %[_1], %[_2] \r\n" /* rev[1]*interp[2] */ + "ldrsh %[_1], [%[interp], #6] \r\n" + "add %[_0], %[out], %[_0], asr #12 \r\n" + "mul %[_3], %[_1], %[_3] \r\n" /* rev[0]*interp[3] */ + "add %[_2], %[_0], %[_2], asr #12 \r\n" + "mov %[_2], %[_2], lsl #17 \r\n" + "mov %[_3], %[_3], asr #12 \r\n" + "mov %[_3], %[_3], asl #1 \r\n" + "add %[out], %[_3], %[_2], asr #16 \r\n" + : [out]"=&r"(output), + [_0]"=&r"(amp_0), [_1]"=&r"(amp_1), + [_2]"=&r"(_2), [_3]"=&r"(_3) + : [fwd]"r"(fwd), [rev]"r"(rev), + [interp]"r"(interp)); + + output = CLAMP16(output); + } + /* Apply voice envelope */ + asm volatile ( + "mul %[_0], %[out], %[envx] \r\n" + : [_0]"=r"(amp_0) + : [out]"r"(output), [envx]"r"((int)voice->envx)); + /* Reduce and apply left and right volume */ + asm volatile ( + "mov %[out], %[amp_0], asr #11 \r\n" /* amp_0 = _0 */ + "bic %[out], %[out], #0x1 \r\n" + "mul %[amp_0], %[out], %[vvol_0] \r\n" + "mul %[amp_1], %[out], %[vvol_1] \r\n" + : [out]"+r"(output), + [amp_0]"+r"(amp_0), [amp_1]"=r"(amp_1) + : [vvol_0]"r"((int)voice->volume[0]), + [vvol_1]"r"((int)voice->volume[1])); + + prev_outx = output; + raw_voice->outx = output >> 8; + #endif /* ARM_ARCH >= 6 */ + #else /* Unoptimized CPU */ + int output = *(int16_t*) &this->noise; + + if ( !(this->r.g.noise_enables & vbit) ) + { + output = (fwd [0] * interp [0]) & ~0xFFF; + output = (output + fwd [1] * interp [1]) & ~0xFFF; + output = (output + rev [1] * interp [2]) >> 12; + output = (int16_t) (output * 2); + output += ((rev [0] * interp [3]) >> 12) * 2; + output = CLAMP16( output ); + } + output = (output * voice->envx) >> 11 & ~1; + + /* duplicated here to give compiler more to run in parallel */ + amp_0 = voice->volume [0] * output; + amp_1 = voice->volume [1] * output; + + prev_outx = output; + raw_voice->outx = output >> 8; + #endif /* CPU_* */ + } + #else /* SPCNOINTERP */ + /* two-point linear interpolation */ + #ifdef CPU_COLDFIRE + int amp_0 = (int16_t)this->noise; + int amp_1; + + if ( (this->r.g.noise_enables & vbit) == 0 ) + { + uint32_t f = voice->position; + int32_t y0; + + /** + * Formula (fastest found so far of MANY): + * output = y0 + f*y1 - f*y0 + */ + asm volatile ( + /* separate fractional and whole parts */ + "move.l %[f], %[y1] \r\n" + "and.l #0xfff, %[f] \r\n" + "lsr.l %[sh], %[y1] \r\n" + /* load samples y0 (upper) & y1 (lower) */ + "move.l 2(%[s], %[y1].l*2), %[y1] \r\n" + /* %acc0 = f*y1 */ + "mac.w %[f]l, %[y1]l, %%acc0 \r\n" + /* %acc0 -= f*y0 */ + "msac.w %[f]l, %[y1]u, %%acc0 \r\n" + /* separate out y0 and sign extend */ + "swap %[y1] \r\n" + "movea.w %[y1], %[y0] \r\n" + /* fetch result, scale down and add y0 */ + "movclr.l %%acc0, %[y1] \r\n" + /* output = y0 + (result >> 12) */ + "asr.l %[sh], %[y1] \r\n" + "add.l %[y0], %[y1] \r\n" + : [f]"+d"(f), [y0]"=&a"(y0), [y1]"=&d"(amp_0) + : [s]"a"(voice->samples), [sh]"d"(12)); + } + + /* apply voice envelope to output */ + asm volatile ( + "mac.w %[out]l, %[envx]l, %%acc0 \r\n" + : + : [out]"r"(amp_0), [envx]"r"(voice->envx)); + + /* advance voice position */ + voice->position += rate; + + /* fetch output, scale and apply left and right + voice volume */ + asm volatile ( + "movclr.l %%acc0, %[out] \r\n" + "asr.l %[sh], %[out] \r\n" + "mac.l %[vvol_0], %[out], %%acc0 \r\n" + "mac.l %[vvol_1], %[out], %%acc1 \r\n" + : [out]"=&d"(amp_0) + : [vvol_0]"r"((int)voice->volume[0]), + [vvol_1]"r"((int)voice->volume[1]), + [sh]"d"(11)); + + /* save this output into previous, scale and save in + output register */ + prev_outx = amp_0; + raw_voice->outx = amp_0 >> 8; + + /* fetch final voice output */ + asm volatile ( + "movclr.l %%acc0, %[amp_0] \r\n" + "movclr.l %%acc1, %[amp_1] \r\n" + : [amp_0]"=r"(amp_0), [amp_1]"=r"(amp_1)); + #elif defined (CPU_ARM) + int amp_0, amp_1; + + if ( (this->r.g.noise_enables & vbit) != 0 ) + { + amp_0 = *(int16_t *)&this->noise; + } + else + { + uint32_t f = voice->position; + amp_0 = (uint32_t)voice->samples; + + asm volatile( + "mov %[y1], %[f], lsr #12 \r\n" + "eor %[f], %[f], %[y1], lsl #12 \r\n" + "add %[y1], %[y0], %[y1], lsl #1 \r\n" + "ldrsh %[y0], [%[y1], #2] \r\n" + "ldrsh %[y1], [%[y1], #4] \r\n" + "sub %[y1], %[y1], %[y0] \r\n" + "mul %[f], %[y1], %[f] \r\n" + "add %[y0], %[y0], %[f], asr #12 \r\n" + : [f]"+r"(f), [y0]"+r"(amp_0), [y1]"=&r"(amp_1)); + } + + voice->position += rate; + + asm volatile( + "mul %[amp_1], %[amp_0], %[envx] \r\n" + "mov %[amp_0], %[amp_1], asr #11 \r\n" + "mov %[amp_1], %[amp_0], asr #8 \r\n" + : [amp_0]"+r"(amp_0), [amp_1]"=r"(amp_1) + : [envx]"r"(voice->envx)); + + prev_outx = amp_0; + raw_voice->outx = (int8_t)amp_1; + + asm volatile( + "mul %[amp_1], %[amp_0], %[vol_1] \r\n" + "mul %[amp_0], %[vol_0], %[amp_0] \r\n" + : [amp_0]"+r"(amp_0), [amp_1]"=&r"(amp_1) + : [vol_0]"r"((int)voice->volume[0]), + [vol_1]"r"((int)voice->volume[1])); + #else /* Unoptimized CPU */ + int output; + + if ( (this->r.g.noise_enables & vbit) == 0 ) + { + int const fraction = voice->position & 0xfff; + short const* const pos = (voice->samples + (voice->position >> 12)) + 1; + output = pos[0] + ((fraction * (pos[1] - pos[0])) >> 12); + } else { + output = *(int16_t *)&this->noise; + } + + voice->position += rate; + + output = (output * voice->envx) >> 11; + + /* duplicated here to give compiler more to run in parallel */ + int amp_0 = voice->volume [0] * output; + int amp_1 = voice->volume [1] * output; + + prev_outx = output; + raw_voice->outx = (int8_t) (output >> 8); + #endif /* CPU_* */ + #endif /* SPCNOINTERP */ + + #if SPC_BRRCACHE + if ( voice->position >= voice->wave_end ) + { + long loop_len = voice->wave_loop << 12; + voice->position -= loop_len; + this->r.g.wave_ended |= vbit; + if ( !loop_len ) + { + this->keys_down ^= vbit; + raw_voice->envx = 0; + voice->envx = 0; + } + } + #endif +#if 0 + EXIT_TIMER(dsp_gen); + + ENTER_TIMER(dsp_mix); +#endif + chans_0 += amp_0; + chans_1 += amp_1; + #if !SPC_NOECHO + if ( this->r.g.echo_ons & vbit ) + { + echo_0 += amp_0; + echo_1 += amp_1; + } + #endif +#if 0 + EXIT_TIMER(dsp_mix); +#endif + } + /* end of voice loop */ + + #if !SPC_NOECHO + #ifdef CPU_COLDFIRE + /* Read feedback from echo buffer */ + int echo_pos = this->echo_pos; + uint8_t* const echo_ptr = RAM + ((echo_start + echo_pos) & 0xFFFF); + echo_pos += 4; + if ( echo_pos >= echo_wrap ) + echo_pos = 0; + this->echo_pos = echo_pos; + int fb = swap_odd_even32(*(int32_t *)echo_ptr); + int out_0, out_1; + + /* Keep last 8 samples */ + *this->last_fir_ptr = fb; + this->last_fir_ptr = this->fir_ptr; + + /* Apply echo FIR filter to output samples read from echo buffer - + circular buffer is hardware incremented and masked; FIR + coefficients and buffer history are loaded in parallel with + multiply accumulate operations. Shift left by one here and once + again when calculating feedback to have sample values justified + to bit 31 in the output to ease endian swap, interleaving and + clamping before placing result in the program's echo buffer. */ + int _0, _1, _2; + asm volatile ( + "move.l (%[fir_c]) , %[_2] \r\n" + "mac.w %[fb]u, %[_2]u, <<, (%[fir_p])+&, %[_0], %%acc0 \r\n" + "mac.w %[fb]l, %[_2]u, <<, (%[fir_p])& , %[_1], %%acc1 \r\n" + "mac.w %[_0]u, %[_2]l, << , %%acc0 \r\n" + "mac.w %[_0]l, %[_2]l, <<, 4(%[fir_c]) , %[_2], %%acc1 \r\n" + "mac.w %[_1]u, %[_2]u, <<, 4(%[fir_p])& , %[_0], %%acc0 \r\n" + "mac.w %[_1]l, %[_2]u, <<, 8(%[fir_p])& , %[_1], %%acc1 \r\n" + "mac.w %[_0]u, %[_2]l, << , %%acc0 \r\n" + "mac.w %[_0]l, %[_2]l, <<, 8(%[fir_c]) , %[_2], %%acc1 \r\n" + "mac.w %[_1]u, %[_2]u, <<, 12(%[fir_p])& , %[_0], %%acc0 \r\n" + "mac.w %[_1]l, %[_2]u, <<, 16(%[fir_p])& , %[_1], %%acc1 \r\n" + "mac.w %[_0]u, %[_2]l, << , %%acc0 \r\n" + "mac.w %[_0]l, %[_2]l, <<, 12(%[fir_c]) , %[_2], %%acc1 \r\n" + "mac.w %[_1]u, %[_2]u, <<, 20(%[fir_p])& , %[_0], %%acc0 \r\n" + "mac.w %[_1]l, %[_2]u, << , %%acc1 \r\n" + "mac.w %[_0]u, %[_2]l, << , %%acc0 \r\n" + "mac.w %[_0]l, %[_2]l, << , %%acc1 \r\n" + : [_0]"=&r"(_0), [_1]"=&r"(_1), [_2]"=&r"(_2), + [fir_p]"+a"(this->fir_ptr) + : [fir_c]"a"(this->fir_coeff), [fb]"r"(fb) + ); + + /* Generate output */ + asm volatile ( + /* fetch filter results _after_ gcc loads asm + block parameters to eliminate emac stalls */ + "movclr.l %%acc0, %[out_0] \r\n" + "movclr.l %%acc1, %[out_1] \r\n" + /* apply global volume */ + "mac.l %[chans_0], %[gv_0] , %%acc2 \r\n" + "mac.l %[chans_1], %[gv_1] , %%acc3 \r\n" + /* apply echo volume and add to final output */ + "mac.l %[ev_0], %[out_0], >>, %%acc2 \r\n" + "mac.l %[ev_1], %[out_1], >>, %%acc3 \r\n" + : [out_0]"=&r"(out_0), [out_1]"=&r"(out_1) + : [chans_0]"r"(chans_0), [gv_0]"r"(global_vol_0), + [ev_0]"r"((int)this->r.g.echo_volume_0), + [chans_1]"r"(chans_1), [gv_1]"r"(global_vol_1), + [ev_1]"r"((int)this->r.g.echo_volume_1) + ); + + /* Feedback into echo buffer */ + if ( !(this->r.g.flags & 0x20) ) + { + int sh = 1 << 9; + + asm volatile ( + /* scale echo voices; saturate if overflow */ + "mac.l %[sh], %[e1] , %%acc1 \r\n" + "mac.l %[sh], %[e0] , %%acc0 \r\n" + /* add scaled output from FIR filter */ + "mac.l %[out_1], %[ef], <<, %%acc1 \r\n" + "mac.l %[out_0], %[ef], <<, %%acc0 \r\n" + /* swap and fetch feedback results - simply + swap_odd_even32 mixed in between macs and + movclrs to mitigate stall issues */ + "move.l #0x00ff00ff, %[sh] \r\n" + "movclr.l %%acc1, %[e1] \r\n" + "swap %[e1] \r\n" + "movclr.l %%acc0, %[e0] \r\n" + "move.w %[e1], %[e0] \r\n" + "and.l %[e0], %[sh] \r\n" + "eor.l %[sh], %[e0] \r\n" + "lsl.l #8, %[sh] \r\n" + "lsr.l #8, %[e0] \r\n" + "or.l %[sh], %[e0] \r\n" + /* save final feedback into echo buffer */ + "move.l %[e0], (%[echo_ptr]) \r\n" + : [e0]"+d"(echo_0), [e1]"+d"(echo_1), [sh]"+d"(sh) + : [out_0]"r"(out_0), [out_1]"r"(out_1), + [ef]"r"((int)this->r.g.echo_feedback), + [echo_ptr]"a"((int32_t *)echo_ptr) + ); + } + + /* Output final samples */ + asm volatile ( + /* fetch output saved in %acc2 and %acc3 */ + "movclr.l %%acc2, %[out_0] \r\n" + "movclr.l %%acc3, %[out_1] \r\n" + /* scale right by global_muting shift */ + "asr.l %[gm], %[out_0] \r\n" + "asr.l %[gm], %[out_1] \r\n" + : [out_0]"=&d"(out_0), [out_1]"=&d"(out_1) + : [gm]"d"(global_muting) + ); + + out_buf [ 0] = out_0; + out_buf [WAV_CHUNK_SIZE] = out_1; + out_buf ++; + #elif defined (CPU_ARM) + /* Read feedback from echo buffer */ + int echo_pos = this->echo_pos; + uint8_t* const echo_ptr = RAM + + ((this->r.g.echo_page * 0x100 + echo_pos) & 0xFFFF); + echo_pos += 4; + if ( echo_pos >= (this->r.g.echo_delay & 15) * 0x800 ) + echo_pos = 0; + this->echo_pos = echo_pos; + + #if ARM_ARCH >= 6 + int32_t *fir_ptr, *fir_coeff; + int fb_0, fb_1; + + /* Apply FIR */ + + /* Keep last 8 samples */ + asm volatile ( + "ldr %[fb_0], [%[echo_p]] \r\n" + "add %[fir_p], %[t_fir_p], #4 \r\n" + "bic %[t_fir_p], %[fir_p], %[mask] \r\n" + "str %[fb_0], [%[fir_p], #-4] \r\n" + /* duplicate at +8 eliminates wrap checking below */ + "str %[fb_0], [%[fir_p], #28] \r\n" + : [fir_p]"=&r"(fir_ptr), [t_fir_p]"+r"(this->fir_ptr), + [fb_0]"=&r"(fb_0) + : [echo_p]"r"(echo_ptr), [mask]"i"(~FIR_BUF_MASK)); + + fir_coeff = (int32_t *)this->fir_coeff; + + /* Fugly, but the best version found. */ + int _0; + asm volatile ( /* L0R0 = acc0 */ + "ldmia %[fir_p]!, { r2-r5 } \r\n" /* L1R1-L4R4 = r2-r5 */ + "ldmia %[fir_c]!, { r0-r1 } \r\n" /* C0C1-C2C3 = r0-r1 */ + "pkhbt %[_0], %[acc0], r2, asl #16 \r\n" /* L0R0,L1R1->L0L1,R0R1 */ + "pkhtb r2, r2, %[acc0], asr #16 \r\n" + "smuad %[acc0], %[_0], r0 \r\n" /* acc0=L0*C0+L1*C1 */ + "smuad %[acc1], r2, r0 \r\n" /* acc1=R0*C0+R1*C1 */ + "pkhbt %[_0], r3, r4, asl #16 \r\n" /* L2R2,L3R3->L2L3,R2R3 */ + "pkhtb r4, r4, r3, asr #16 \r\n" + "smlad %[acc0], %[_0], r1, %[acc0] \r\n" /* acc0+=L2*C2+L3*C3 */ + "smlad %[acc1], r4, r1, %[acc1] \r\n" /* acc1+=R2*C2+R3*C3 */ + "ldmia %[fir_p], { r2-r4 } \r\n" /* L5R5-L7R7 = r2-r4 */ + "ldmia %[fir_c], { r0-r1 } \r\n" /* C4C5-C6C7 = r0-r1 */ + "pkhbt %[_0], r5, r2, asl #16 \r\n" /* L4R4,L5R5->L4L5,R4R5 */ + "pkhtb r2, r2, r5, asr #16 \r\n" + "smlad %[acc0], %[_0], r0, %[acc0] \r\n" /* acc0+=L4*C4+L5*C5 */ + "smlad %[acc1], r2, r0, %[acc1] \r\n" /* acc1+=R4*C4+R5*C5 */ + "pkhbt %[_0], r3, r4, asl #16 \r\n" /* L6R6,L7R7->L6L7,R6R7 */ + "pkhtb r4, r4, r3, asr #16 \r\n" + "smlad %[acc0], %[_0], r1, %[acc0] \r\n" /* acc0+=L6*C6+L7*C7 */ + "smlad %[acc1], r4, r1, %[acc1] \r\n" /* acc1+=R6*C6+R7*C7 */ + : [acc0]"+r"(fb_0), [acc1]"=&r"(fb_1), [_0]"=&r"(_0), + [fir_p]"+r"(fir_ptr), [fir_c]"+r"(fir_coeff) + : + : "r0", "r1", "r2", "r3", "r4", "r5"); + + /* Generate output */ + int amp_0, amp_1; + + asm volatile ( + "mul %[amp_0], %[gvol_0], %[chans_0] \r\n" + "mul %[amp_1], %[gvol_1], %[chans_1] \r\n" + : [amp_0]"=&r"(amp_0), [amp_1]"=r"(amp_1) + : [gvol_0]"r"(global_vol_0), [gvol_1]"r"(global_vol_1), + [chans_0]"r"(chans_0), [chans_1]"r"(chans_1)); + asm volatile ( + "mla %[amp_0], %[fb_0], %[ev_0], %[amp_0] \r\n" + "mla %[amp_1], %[fb_1], %[ev_1], %[amp_1] \r\n" + : [amp_0]"+r"(amp_0), [amp_1]"+r"(amp_1) + : [fb_0]"r"(fb_0), [fb_1]"r"(fb_1), + [ev_0]"r"((int)this->r.g.echo_volume_0), + [ev_1]"r"((int)this->r.g.echo_volume_1)); + + out_buf [ 0] = amp_0 >> global_muting; + out_buf [WAV_CHUNK_SIZE] = amp_1 >> global_muting; + out_buf ++; + + if ( !(this->r.g.flags & 0x20) ) + { + /* Feedback into echo buffer */ + int e0, e1; + + asm volatile ( + "mov %[e0], %[echo_0], asl #7 \r\n" + "mov %[e1], %[echo_1], asl #7 \r\n" + "mla %[e0], %[fb_0], %[efb], %[e0] \r\n" + "mla %[e1], %[fb_1], %[efb], %[e1] \r\n" + : [e0]"=&r"(e0), [e1]"=&r"(e1) + : [echo_0]"r"(echo_0), [echo_1]"r"(echo_1), + [fb_0]"r"(fb_0), [fb_1]"r"(fb_1), + [efb]"r"((int)this->r.g.echo_feedback)); + asm volatile ( + "ssat %[e0], #16, %[e0], asr #14 \r\n" + "ssat %[e1], #16, %[e1], asr #14 \r\n" + "pkhbt %[e0], %[e0], %[e1], lsl #16 \r\n" + "str %[e0], [%[echo_p]] \r\n" + : [e0]"+r"(e0), [e1]"+r"(e1) + : [echo_p]"r"(echo_ptr)); + } + #else /* ARM_ARCH < 6 */ + int fb_0 = GET_LE16SA( echo_ptr ); + int fb_1 = GET_LE16SA( echo_ptr + 2 ); + int32_t *fir_ptr, *fir_coeff; + + /* Keep last 8 samples */ + + /* Apply FIR */ + asm volatile ( + "add %[fir_p], %[t_fir_p], #8 \r\n" + "bic %[t_fir_p], %[fir_p], %[mask] \r\n" + "str %[fb_0], [%[fir_p], #-8] \r\n" + "str %[fb_1], [%[fir_p], #-4] \r\n" + /* duplicate at +8 eliminates wrap checking below */ + "str %[fb_0], [%[fir_p], #56] \r\n" + "str %[fb_1], [%[fir_p], #60] \r\n" + : [fir_p]"=&r"(fir_ptr), [t_fir_p]"+r"(this->fir_ptr) + : [fb_0]"r"(fb_0), [fb_1]"r"(fb_1), [mask]"i"(~FIR_BUF_MASK)); + + fir_coeff = this->fir_coeff; + + asm volatile ( + "ldmia %[fir_c]!, { r0-r1 } \r\n" + "ldmia %[fir_p]!, { r4-r5 } \r\n" + "mul %[fb_0], r0, %[fb_0] \r\n" + "mul %[fb_1], r0, %[fb_1] \r\n" + "mla %[fb_0], r4, r1, %[fb_0] \r\n" + "mla %[fb_1], r5, r1, %[fb_1] \r\n" + "ldmia %[fir_c]!, { r0-r1 } \r\n" + "ldmia %[fir_p]!, { r2-r5 } \r\n" + "mla %[fb_0], r2, r0, %[fb_0] \r\n" + "mla %[fb_1], r3, r0, %[fb_1] \r\n" + "mla %[fb_0], r4, r1, %[fb_0] \r\n" + "mla %[fb_1], r5, r1, %[fb_1] \r\n" + "ldmia %[fir_c]!, { r0-r1 } \r\n" + "ldmia %[fir_p]!, { r2-r5 } \r\n" + "mla %[fb_0], r2, r0, %[fb_0] \r\n" + "mla %[fb_1], r3, r0, %[fb_1] \r\n" + "mla %[fb_0], r4, r1, %[fb_0] \r\n" + "mla %[fb_1], r5, r1, %[fb_1] \r\n" + "ldmia %[fir_c]!, { r0-r1 } \r\n" + "ldmia %[fir_p]!, { r2-r5 } \r\n" + "mla %[fb_0], r2, r0, %[fb_0] \r\n" + "mla %[fb_1], r3, r0, %[fb_1] \r\n" + "mla %[fb_0], r4, r1, %[fb_0] \r\n" + "mla %[fb_1], r5, r1, %[fb_1] \r\n" + : [fb_0]"+r"(fb_0), [fb_1]"+r"(fb_1), + [fir_p]"+r"(fir_ptr), [fir_c]"+r"(fir_coeff) + : + : "r0", "r1", "r2", "r3", "r4", "r5"); + + /* Generate output */ + int amp_0 = (chans_0 * global_vol_0 + fb_0 * this->r.g.echo_volume_0) + >> global_muting; + int amp_1 = (chans_1 * global_vol_1 + fb_1 * this->r.g.echo_volume_1) + >> global_muting; + + out_buf [ 0] = amp_0; + out_buf [WAV_CHUNK_SIZE] = amp_1; + out_buf ++; + + if ( !(this->r.g.flags & 0x20) ) + { + /* Feedback into echo buffer */ + int e0 = (echo_0 >> 7) + ((fb_0 * this->r.g.echo_feedback) >> 14); + int e1 = (echo_1 >> 7) + ((fb_1 * this->r.g.echo_feedback) >> 14); + e0 = CLAMP16( e0 ); + SET_LE16A( echo_ptr , e0 ); + e1 = CLAMP16( e1 ); + SET_LE16A( echo_ptr + 2, e1 ); + } + #endif /* ARM_ARCH */ + #else /* Unoptimized CPU */ + /* Read feedback from echo buffer */ + int echo_pos = this->echo_pos; + uint8_t* const echo_ptr = RAM + + ((this->r.g.echo_page * 0x100 + echo_pos) & 0xFFFF); + echo_pos += 4; + if ( echo_pos >= (this->r.g.echo_delay & 15) * 0x800 ) + echo_pos = 0; + this->echo_pos = echo_pos; + int fb_0 = GET_LE16SA( echo_ptr ); + int fb_1 = GET_LE16SA( echo_ptr + 2 ); + + /* Keep last 8 samples */ + int (* const fir_ptr) [2] = this->fir_buf + this->fir_pos; + this->fir_pos = (this->fir_pos + 1) & (FIR_BUF_HALF - 1); + fir_ptr [ 0] [0] = fb_0; + fir_ptr [ 0] [1] = fb_1; + /* duplicate at +8 eliminates wrap checking below */ + fir_ptr [FIR_BUF_HALF] [0] = fb_0; + fir_ptr [FIR_BUF_HALF] [1] = fb_1; + + /* Apply FIR */ + fb_0 *= this->fir_coeff [0]; + fb_1 *= this->fir_coeff [0]; + + #define DO_PT( i )\ + fb_0 += fir_ptr [i] [0] * this->fir_coeff [i];\ + fb_1 += fir_ptr [i] [1] * this->fir_coeff [i]; + + DO_PT( 1 ) + DO_PT( 2 ) + DO_PT( 3 ) + DO_PT( 4 ) + DO_PT( 5 ) + DO_PT( 6 ) + DO_PT( 7 ) + + /* Generate output */ + int amp_0 = (chans_0 * global_vol_0 + fb_0 * this->r.g.echo_volume_0) + >> global_muting; + int amp_1 = (chans_1 * global_vol_1 + fb_1 * this->r.g.echo_volume_1) + >> global_muting; + out_buf [ 0] = amp_0; + out_buf [WAV_CHUNK_SIZE] = amp_1; + out_buf ++; + + if ( !(this->r.g.flags & 0x20) ) + { + /* Feedback into echo buffer */ + int e0 = (echo_0 >> 7) + ((fb_0 * this->r.g.echo_feedback) >> 14); + int e1 = (echo_1 >> 7) + ((fb_1 * this->r.g.echo_feedback) >> 14); + e0 = CLAMP16( e0 ); + SET_LE16A( echo_ptr , e0 ); + e1 = CLAMP16( e1 ); + SET_LE16A( echo_ptr + 2, e1 ); + } + #endif /* CPU_* */ + #else /* SPCNOECHO == 1*/ + /* Generate output */ + int amp_0 = (chans_0 * global_vol_0) >> global_muting; + int amp_1 = (chans_1 * global_vol_1) >> global_muting; + out_buf [ 0] = amp_0; + out_buf [WAV_CHUNK_SIZE] = amp_1; + out_buf ++; + #endif /* SPCNOECHO */ + } + while ( --count ); +#if 0 + EXIT_TIMER(dsp); + ENTER_TIMER(cpu); +#endif +} + +void DSP_reset( struct Spc_Dsp* this ) +{ + this->keys_down = 0; + this->echo_pos = 0; + this->noise_count = 0; + this->noise = 2; + + this->r.g.flags = 0xE0; /* reset, mute, echo off */ + this->r.g.key_ons = 0; + + ci->memset( this->voice_state, 0, sizeof this->voice_state ); + + int i; + for ( i = VOICE_COUNT; --i >= 0; ) + { + struct voice_t* v = this->voice_state + i; + v->env_mode = state_release; + v->addr = ram.ram; + } + + #if SPC_BRRCACHE + this->oldsize = 0; + for ( i = 0; i < 256; i++ ) + this->wave_entry [i].start_addr = -1; + #endif + +#if defined(CPU_COLDFIRE) + this->fir_ptr = fir_buf; + this->last_fir_ptr = &fir_buf [7]; + ci->memset( fir_buf, 0, sizeof fir_buf ); +#elif defined (CPU_ARM) + this->fir_ptr = fir_buf; + ci->memset( fir_buf, 0, sizeof fir_buf ); +#else + this->fir_pos = 0; + ci->memset( this->fir_buf, 0, sizeof this->fir_buf ); +#endif + + assert( offsetof (struct globals_t,unused9 [2]) == REGISTER_COUNT ); + assert( sizeof (this->r.voice) == REGISTER_COUNT ); +} diff --git a/lib/rbcodec/codecs/libspc/spc_emu.c b/lib/rbcodec/codecs/libspc/spc_emu.c new file mode 100644 index 0000000000..5ea5b0cdeb --- /dev/null +++ b/lib/rbcodec/codecs/libspc/spc_emu.c @@ -0,0 +1,397 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2006-2007 Adam Gashlin (hcs) + * Copyright (C) 2004-2007 Shay Green (blargg) + * Copyright (C) 2002 Brad Martin + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include "codeclib.h" +#include "spc_codec.h" +#include "spc_profiler.h" + +/* lovingly ripped off from Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */ +/* DSP Based on Brad Martin's OpenSPC DSP emulator */ +/* tag reading from sexyspc by John Brawn (John_Brawn@yahoo.com) and others */ + +struct cpu_ram_t ram IBSS_ATTR_SPC_LARGE_IRAM CACHEALIGN_ATTR; + +/**************** Timers ****************/ + +static void Timer_run_( struct Timer* t, long time ) ICODE_ATTR_SPC; +static void Timer_run_( struct Timer* t, long time ) +{ + /* when disabled, next_tick should always be in the future */ + assert( t->enabled ); + + int elapsed = ((time - t->next_tick) >> t->shift) + 1; + t->next_tick += elapsed << t->shift; + + elapsed += t->count; + if ( elapsed >= t->period ) /* avoid unnecessary division */ + { + int n = elapsed / t->period; + elapsed -= n * t->period; + t->counter = (t->counter + n) & 15; + } + t->count = elapsed; +} + +static inline void Timer_run( struct Timer* t, long time ) +{ + if ( time >= t->next_tick ) + Timer_run_( t, time ); +} + +/**************** SPC emulator ****************/ +/* 1.024 MHz clock / 32000 samples per second */ + +static void SPC_enable_rom( THIS, int enable ) +{ + if ( this->rom_enabled != enable ) + { + this->rom_enabled = enable; + ci->memcpy( RAM + ROM_ADDR, (enable ? this->boot_rom : this->extra_ram), ROM_SIZE ); + /* TODO: ROM can still get overwritten when DSP writes to echo buffer */ + } +} + +void SPC_Init( THIS ) +{ + this->timer [0].shift = 4 + 3; /* 8 kHz */ + this->timer [1].shift = 4 + 3; /* 8 kHz */ + this->timer [2].shift = 4; /* 8 kHz */ + + /* Put STOP instruction around memory to catch PC underflow/overflow. */ + ci->memset( ram.padding1, 0xFF, sizeof ram.padding1 ); + ci->memset( ram.padding2, 0xFF, sizeof ram.padding2 ); + + /* A few tracks read from the last four bytes of IPL ROM */ + this->boot_rom [sizeof this->boot_rom - 2] = 0xC0; + this->boot_rom [sizeof this->boot_rom - 1] = 0xFF; + ci->memset( this->boot_rom, 0, sizeof this->boot_rom - 2 ); + + /* Have DSP in a defined state in case EMU is run and hasn't loaded + * a program yet */ + DSP_reset(&this->dsp); +} + +static void SPC_load_state( THIS, struct cpu_regs_t const* cpu_state, + const void* new_ram, const void* dsp_state ) +{ + ci->memcpy(&(this->r),cpu_state,sizeof this->r); + + /* ram */ + ci->memcpy( RAM, new_ram, sizeof RAM ); + ci->memcpy( this->extra_ram, RAM + ROM_ADDR, sizeof this->extra_ram ); + + /* boot rom (have to force enable_rom() to update it) */ + this->rom_enabled = !(RAM [0xF1] & 0x80); + SPC_enable_rom( this, !this->rom_enabled ); + + /* dsp */ + /* some SPCs rely on DSP immediately generating one sample */ + this->extra_cycles = 32; + DSP_reset( &this->dsp ); + int i; + for ( i = 0; i < REGISTER_COUNT; i++ ) + DSP_write( &this->dsp, i, ((uint8_t const*) dsp_state) [i] ); + + /* timers */ + for ( i = 0; i < TIMER_COUNT; i++ ) + { + struct Timer* t = &this->timer [i]; + + t->next_tick = -EXTRA_CLOCKS; + t->enabled = (RAM [0xF1] >> i) & 1; + if ( !t->enabled ) + t->next_tick = TIMER_DISABLED_TIME; + t->count = 0; + t->counter = RAM [0xFD + i] & 15; + + int p = RAM [0xFA + i]; + if ( !p ) + p = 0x100; + t->period = p; + } + + /* Handle registers which already give 0 when read by + setting RAM and not changing it. + Put STOP instruction in registers which can be read, + to catch attempted execution. */ + RAM [0xF0] = 0; + RAM [0xF1] = 0; + RAM [0xF3] = 0xFF; + RAM [0xFA] = 0; + RAM [0xFB] = 0; + RAM [0xFC] = 0; + RAM [0xFD] = 0xFF; + RAM [0xFE] = 0xFF; + RAM [0xFF] = 0xFF; +} + +static void clear_echo( THIS ) +{ + if ( !(DSP_read( &this->dsp, 0x6C ) & 0x20) ) + { + unsigned addr = 0x100 * DSP_read( &this->dsp, 0x6D ); + size_t size = 0x800 * DSP_read( &this->dsp, 0x7D ); + size_t max_size = sizeof RAM - addr; + if ( size > max_size ) + size = sizeof RAM - addr; + ci->memset( RAM + addr, 0xFF, size ); + } +} + +int SPC_load_spc( THIS, const void* data, long size ) +{ + struct spc_file_t const* spc = (struct spc_file_t const*) data; + struct cpu_regs_t regs; + + if ( size < SPC_FILE_SIZE ) + return -1; + + if ( ci->memcmp( spc->signature, "SNES-SPC700 Sound File Data", 27 ) != 0 ) + return -1; + + regs.pc = spc->pc [1] * 0x100 + spc->pc [0]; + regs.a = spc->a; + regs.x = spc->x; + regs.y = spc->y; + regs.status = spc->status; + regs.sp = spc->sp; + + if ( (unsigned long) size >= sizeof *spc ) + ci->memcpy( this->boot_rom, spc->ipl_rom, sizeof this->boot_rom ); + + SPC_load_state( this, ®s, spc->ram, spc->dsp ); + + clear_echo(this); + + return 0; +} + +/**************** DSP interaction ****************/ +static void SPC_run_dsp_( THIS, long time ) ICODE_ATTR_SPC; +static void SPC_run_dsp_( THIS, long time ) +{ + /* divide by CLOCKS_PER_SAMPLE */ + int count = ((time - this->next_dsp) >> 5) + 1; + int32_t* buf = this->sample_buf; + this->sample_buf = buf + count; + this->next_dsp += count * CLOCKS_PER_SAMPLE; + DSP_run( &this->dsp, count, buf ); +} + +static inline void SPC_run_dsp( THIS, long time ) +{ + if ( time >= this->next_dsp ) + SPC_run_dsp_( this, time ); +} + +int SPC_read( THIS, unsigned addr, long const time ) +{ + int result = RAM [addr]; + + if ( ((unsigned) (addr - 0xF0)) < 0x10 ) + { + assert( 0xF0 <= addr && addr <= 0xFF ); + + /* counters */ + int i = addr - 0xFD; + if ( i >= 0 ) + { + struct Timer* t = &this->timer [i]; + Timer_run( t, time ); + result = t->counter; + t->counter = 0; + } + /* dsp */ + else if ( addr == 0xF3 ) + { + SPC_run_dsp( this, time ); + result = DSP_read( &this->dsp, RAM [0xF2] & 0x7F ); + } + } + return result; +} + +void SPC_write( THIS, unsigned addr, int data, long const time ) +{ + /* first page is very common */ + if ( addr < 0xF0 ) + { + RAM [addr] = (uint8_t) data; + } + else switch ( addr ) + { + /* RAM */ + default: + if ( addr < ROM_ADDR ) + { + RAM [addr] = (uint8_t) data; + } + else + { + this->extra_ram [addr - ROM_ADDR] = (uint8_t) data; + if ( !this->rom_enabled ) + RAM [addr] = (uint8_t) data; + } + break; + + /* DSP */ + /*case 0xF2:*/ /* mapped to RAM */ + case 0xF3: { + SPC_run_dsp( this, time ); + int reg = RAM [0xF2]; + if ( reg < REGISTER_COUNT ) { + DSP_write( &this->dsp, reg, data ); + } + else { + /*dprintf( "DSP write to $%02X\n", (int) reg ); */ + } + break; + } + + case 0xF0: /* Test register */ + /*dprintf( "Wrote $%02X to $F0\n", (int) data ); */ + break; + + /* Config */ + case 0xF1: + { + int i; + /* timers */ + for ( i = 0; i < TIMER_COUNT; i++ ) + { + struct Timer * t = this->timer+i; + if ( !(data & (1 << i)) ) + { + t->enabled = 0; + t->next_tick = TIMER_DISABLED_TIME; + } + else if ( !t->enabled ) + { + /* just enabled */ + t->enabled = 1; + t->counter = 0; + t->count = 0; + t->next_tick = time; + } + } + + /* port clears */ + if ( data & 0x10 ) + { + RAM [0xF4] = 0; + RAM [0xF5] = 0; + } + if ( data & 0x20 ) + { + RAM [0xF6] = 0; + RAM [0xF7] = 0; + } + + SPC_enable_rom( this, (data & 0x80) != 0 ); + break; + } + + /* Ports */ + case 0xF4: + case 0xF5: + case 0xF6: + case 0xF7: + /* to do: handle output ports */ + break; + + /* verified on SNES that these are read/write (RAM) */ + /*case 0xF8: */ + /*case 0xF9: */ + + /* Timers */ + case 0xFA: + case 0xFB: + case 0xFC: { + int i = addr - 0xFA; + struct Timer* t = &this->timer [i]; + if ( (t->period & 0xFF) != data ) + { + Timer_run( t, time ); + this->timer[i].period = data ? data : 0x100; + } + break; + } + + /* Counters (cleared on write) */ + case 0xFD: + case 0xFE: + case 0xFF: + /*dprintf( "Wrote to counter $%02X\n", (int) addr ); */ + this->timer [addr - 0xFD].counter = 0; + break; + } +} + +/**************** Sample generation ****************/ +int SPC_play( THIS, long count, int32_t* out ) +{ + int i; + assert( count % 2 == 0 ); /* output is always in pairs of samples */ + + long start_time = -(count >> 1) * CLOCKS_PER_SAMPLE - EXTRA_CLOCKS; + + /* DSP output is made on-the-fly when DSP registers are read or written */ + this->sample_buf = out; + this->next_dsp = start_time + CLOCKS_PER_SAMPLE; + + /* Localize timer next_tick times and run them to the present to prevent + a running but ignored timer's next_tick from getting too far behind + and overflowing. */ + for ( i = 0; i < TIMER_COUNT; i++ ) + { + struct Timer* t = &this->timer [i]; + if ( t->enabled ) + { + t->next_tick += start_time + EXTRA_CLOCKS; + Timer_run( t, start_time ); + } + } + + /* Run from start_time to 0, pre-advancing by extra cycles from last run */ + this->extra_cycles = CPU_run( this, start_time + this->extra_cycles ) + + EXTRA_CLOCKS; + if ( this->extra_cycles < 0 ) + { + /*dprintf( "Unhandled instruction $%02X, pc = $%04X\n", + (int) CPU_read( r.pc ), (unsigned) r.pc ); */ + + return -1; + } + + /* Catch DSP up to present */ +#if 0 + ENTER_TIMER(cpu); +#endif + SPC_run_dsp( this, -EXTRA_CLOCKS ); +#if 0 + EXIT_TIMER(cpu); +#endif + assert( this->next_dsp == CLOCKS_PER_SAMPLE - EXTRA_CLOCKS ); + assert( this->sample_buf - out == count ); + + return 0; +} diff --git a/lib/rbcodec/codecs/libspc/spc_profiler.c b/lib/rbcodec/codecs/libspc/spc_profiler.c new file mode 100644 index 0000000000..0ced8b5bd3 --- /dev/null +++ b/lib/rbcodec/codecs/libspc/spc_profiler.c @@ -0,0 +1,66 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2006-2007 Adam Gashlin (hcs) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +/* lovingly ripped off from Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */ +/* DSP Based on Brad Martin's OpenSPC DSP emulator */ +/* tag reading from sexyspc by John Brawn (John_Brawn@yahoo.com) and others */ + +#if defined(SPC_PROFILE) && defined(USEC_TIMER) + +#include "codeclib.h" +#include "spc_codec.h" +#define SPC_DEFINE_PROFILER_TIMERS +#include "spc_profiler.h" + +void reset_profile_timers(void) +{ + RESET_TIMER(total); + RESET_TIMER(render); +#if 0 + RESET_TIMER(cpu); + RESET_TIMER(dsp); + RESET_TIMER(dsp_pregen); + RESET_TIMER(dsp_gen); + RESET_TIMER(dsp_mix); +#endif +} + +void print_timers(char * path) +{ + int logfd = ci->open("/spclog.txt",O_WRONLY|O_CREAT|O_APPEND, 0666); + ci->fdprintf(logfd,"%s:\t",path); + ci->fdprintf(logfd,"%10ld total\t",READ_TIMER(total)); + PRINT_TIMER_PCT(render,total,"render"); +#if 0 + PRINT_TIMER_PCT(cpu,total,"CPU"); + PRINT_TIMER_PCT(dsp,total,"DSP"); + ci->fdprintf(logfd,"("); + PRINT_TIMER_PCT(dsp_pregen,dsp,"pregen"); + PRINT_TIMER_PCT(dsp_gen,dsp,"gen"); + PRINT_TIMER_PCT(dsp_mix,dsp,"mix"); +#endif + ci->fdprintf(logfd,"\n"); + + ci->close(logfd); + logfd=-1; +} + +#endif /* #if defined(SPC_PROFILE) && defined(USEC_TIMER) */ diff --git a/lib/rbcodec/codecs/libspc/spc_profiler.h b/lib/rbcodec/codecs/libspc/spc_profiler.h new file mode 100644 index 0000000000..405ee43ef9 --- /dev/null +++ b/lib/rbcodec/codecs/libspc/spc_profiler.h @@ -0,0 +1,72 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2006-2007 Adam Gashlin (hcs) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +/* a fun simple elapsed time profiler */ +#ifndef _SPC_PROFILER_H_ +#define _SPC_PROFILER_H_ + +#if defined(SPC_PROFILE) && defined(USEC_TIMER) + +#ifdef SPC_DEFINE_PROFILER_TIMERS +#define CREATE_TIMER(name) uint32_t spc_timer_##name##_start,\ + spc_timer_##name##_total +#else +#define CREATE_TIMER(name) extern uint32_t spc_timer_##name##_start,\ + spc_timer_##name##_total +#endif + +#define ENTER_TIMER(name) spc_timer_##name##_start=USEC_TIMER +#define EXIT_TIMER(name) spc_timer_##name##_total+=\ + (USEC_TIMER-spc_timer_##name##_start) +#define READ_TIMER(name) (spc_timer_##name##_total) +#define RESET_TIMER(name) spc_timer_##name##_total=0 + +#define PRINT_TIMER_PCT(bname,tname,nstr) ci->fdprintf( \ + logfd,"%10ld ",READ_TIMER(bname));\ + ci->fdprintf(logfd,"(%3d%%) " nstr "\t",\ + ((uint64_t)READ_TIMER(bname))*100/READ_TIMER(tname)) + +CREATE_TIMER(total); +CREATE_TIMER(render); +#if 0 +CREATE_TIMER(cpu); +CREATE_TIMER(dsp); +CREATE_TIMER(dsp_pregen); +CREATE_TIMER(dsp_gen); +CREATE_TIMER(dsp_mix); +#endif + +void reset_profile_timers(void); +void print_timers(char * path); + +#else + +#define CREATE_TIMER(name) +#define ENTER_TIMER(name) +#define EXIT_TIMER(name) +#define READ_TIMER(name) +#define RESET_TIMER(name) +#define print_timers(path) +#define reset_profile_timers() + +#endif + +#endif /* _SPC_PROFILER_H_ */ -- cgit v1.2.3